Quiz about 8th Grade Math STAAR Review

Question 1

What is the mean absolute deviation of the following data?

$60, $75, $80, $55, $60

Accepted Answer

$9.20

Answer

$11.50

Answer

$46

Answer

$66

Question 2

What is the mean absolute deviation of the data, to the nearest dollar?

Accepted Answer

$43

Answer

$150

Answer

$125

Answer

$86

Question 3

Which best describes the trend shown in the scatterplot?

Accepted Answer

Non-Linear Trend

Answer

Linear Trend

Answer

Negative Trend

Answer

Mean Trend

Question 4

Which of the following does the diagram below illustrate?

Accepted Answer

The sum of the areas of the two smaller squares equals the area of the largest square.

Answer

The sum of the areas of the two smaller squares is less than the area of the largest square.

Answer

The sum of the areas of the two smaller squares is greater than the area of the largest square.

Answer

The length of the longest side of the triangle equals the sum of the lengths of the sides.

Question 5

The distance a spring stretches varies directly as the force applied. If a force of 140 newtons stretches a spring 4 cm, how much will the force of 350 newtons stretch the same string?

Accepted Answer

10 cm

Answer

0.625 cm

Answer

1.6 cm

Answer

122.5 cm

Question 6

It takes Josh 3 minutes to solve 5 math problems. If this relationship represents a direct variation, how many math problems can Josh solve in 24 minutes?

Accepted Answer

40

Answer

72

Answer

15

Answer

8

Question 7

How many 6-inch cookies qould equal the same area as a 12-inch cookie?

Accepted Answer

4

Answer

2

Answer

6

Answer

12

Question 8

Jacob has already saved $850 for college. He expects the total cost of the first year to be $8,990, and he expects to recieve grants and scholarships that total $1,445. Jacob plans to save $210 every month. At this rate, for how many months will Jacob need to save until he has just enough money to pay for the net price of his first year of college?

Accepted Answer

32 months

Answer

31 months

Answer

36 months

Answer

46 months

Question 9

Expression 1: 0.25x - 12

Expression 2: 18 - 0.55x

For which value of x will the two expressions have the same value?

Accepted Answer

37.5

Answer

-100

Answer

-20

Answer

7.5

Question 10

One-third of Kaylees age increased by 12 is equal to twice her age decreased by 3. How old is Kaylee?

Accepted Answer

9

Answer

5

Answer

8

Answer

15

Question 11

Which of these expressions is true when v = 4 ?

Accepted Answer

-3v = 12 - 6v

Answer

-3v = 12 + 6v

Answer

3v = 12 + 6v

Answer

3v = 12 - 6v

Question 12

How do the returns for simple interest and compound interest compare for the same principal and interest rate?

Accepted Answer

The returns are the same for the first year, but then the returns are greater for compound interest every year after.

Answer

The returns are the same for every year since the principal and rate are the same.

Answer

The returns are the same for the first year, but then the returns are greater for simple interest every year after.

Answer

The return for compund interest is higher than for simple interest for every year.

Question 13

Debra pans to invest $2,250 for 10 years. She can invest in a savings account that pays 4% simple interest or a savings account that pays 4% interest compounded annually. How much more money will she have at the end of 10 years if she chooses the account with compound interest?

Accepted Answer

$180.55

Answer

$144.23

Answer

$900.00

Answer

$1,080.55

Question 14

Scott is planning to invest $750 in a savings account for 5 years. Account X pays 3% simple interest. Account Y pays 3% compounded annually. Which is a true statement about the accounts?

Accepted Answer

Account X earns $22.50 in interest every year.

Answer

At the end of 5 years, Scott would have more money in Account X.

Answer

Account Y earns the same amount of interest every year.

Answer

The total amount in Account Y is more than $900 at the end of 5 years.

Question 15

Which rule represents a dilation of a figure by a scale factor of 5 that is centered at the origin?

Accepted Answer

(x,y) -> (5x, 5y)

Answer

(x,y) -> (1/5x, 1/5y)

Answer

(x,y) -> (x + 5, y + 5)

Answer

(x,y) -> (x - 5, y - 5)

Question 16

A tank contains 340 liters of water then it begins to leak at a rate of 6 liters per minute into an empty container. Which equation shows the number of minutes, x, it will take for the tank and the container to have the same amount of water?

Accepted Answer

340 - 6x = 6x

Answer

340 - 6x = 0 - 340

Answer

340 - 6x = 6x - 340

Answer

340 - 6x = 1/2 x 340

Question 17

Which proportion must be true if the trapezoids in the figure are similar?

Accepted Answer

8/x = y/12

Answer

12/y = 5/10

Answer

y/12 = x/8

Answer

x/8 = 2/4

Question 18

Mya has an exercise ball in the shape of a sphere shown below. She wants to increase the weight of the ball by filling it with water.

Which measurement is closest to the volume of Mya's ball in cubic inches? Use 3.14 for Pi.

Accepted Answer

904 Cubic Inches

Answer

113 Cubic Inches

Answer

457 Cubic Inches

Answer

2,713 Cubic Inches

Question 19

Which measurement is closest to the distance between the two points on the coordinate plane in units?

Accepted Answer

10 units

Answer

6 units

Answer

8 units

Answer

12 units

Question 20

A triangular prism is shown on the diagram. Which measurement is closest to the lateral surface area of this prism in square meters?

Accepted Answer

264 Square Meters

Answer

252 Square Meters

Answer

294 Square Meters

Answer

336 Square Meters

Question 21

Jamal wants to completely cover the cylindrical container in aluminum foil. Which measurement is closest to the total surface area of the cylindrical container in square centimeters? Use 3.14 for

Accepted Answer

8,792 Centimeters Square

Answer

2,512 Centimeters Square

Answer

6,280 Centimeters Square

Answer

7,536 Centimeters Square

Question 22

A diagram of a jewelry box is shown. Which measurement is closest to the total surface area of the jewelry box that would need to be wrapped with wrapping paper in square centimeters?

Accepted Answer

292 Centimeters Square

Answer

146 Centimeters Square

Answer

336 Centimeters Square

Answer

672 Centimeters Square

Question 23

The graph shows the number of people at an amusement park at different parks. If the trend continues, how many people will be there at the park in 2 hours?

Accepted Answer

1,800

Answer

1,000

Answer

1,300

Answer

2,000

Question 24

A side view of a desk telephone is shown below. Which measurement is closest to the value of x in centimeters?

Accepted Answer

6 cm

Answer

2 cm

Answer

10 cm

Answer

20 cm

Question 25

Gwendolyn placed a 10-foot ladder against the side of her house so that the base of the ladder was 3 feet from the base of the house, as shown in the picture. Which measurement in feet is closest to d, the distance from the top of the ladder to the ground?

Accepted Answer

9.5 ft

Answer

10.4 ft

Answer

7.0 ft

Answer

6.5 ft

Question 26

Which of the following measures could NOT be used to create a right triangle?

Accepted Answer

21 ft, 28 ft, 34 ft

Answer

27 ft, 36 ft, 45 ft

Answer

39 ft, 52 ft, 65 ft

Answer

14 ft, 48 ft, 50 ft

Question 27

The table shows the number of books they reported reading for 5 consecutive weeks. Which student reported reading a proportionally increasing number of books for 5 consecutive weeks?

Accepted Answer

Otis

Answer

Pedro

Answer

Noah

Answer

Quannah

Question 28

What value of m makes the equation y + m = 6x + 15 a proportional relationship?

Accepted Answer

15

Answer

-15

Answer

0

Answer

6

Question 29

Given a parallelogram, which of the following would not result in a parallelogram congruent to the original?

Accepted Answer

Dilating the parallelogram by a scale factor of 0.5.

Answer

Reflecting the parallelogram over the line y = x.

Answer

Rotating the parallelogram 90 degrees.

Answer

Translating the parallelogram 5 units up and 2 units to the left.

Question 30

Which of the following transformations preserve conguerence?

I. Translation

II. Reflection

III. Rotation

IV. Dilation

Accepted Answer

I, II, and III only

Answer

I and II only

Answer

II, III, and IV only

Answer

I, III, and IV only

Question 31

Which of the following represents a function?

Accepted Answer

I and III only

Answer

I only

Answer

II only

Answer

II and III only

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