Quiz about 8th Grade Slope Review

Question 1

Determine the slope and y-intercept from the following equation:   y = 3/2x + 3

Accepted Answer

slope: 3/2   y-intercept:  (0,3)

Answer

slope: 5   y-intercept:  (0,3)

Answer

slope:  4  y-intercept:  (0,3/2)

Answer

slope: 1/5   y-intercept:  (0,5)

Question 2

What is the y intercept of this line?

Accepted Answer

3

Answer

-3

Answer

3.5

Answer

-3.5

Question 3

Find the slope of the line.

Accepted Answer

1/2

Answer

-1/2

Answer

2

Answer

-2

Question 4

Write the equation of the line.

Accepted Answer

y = 1/3x - 2

Answer

y = -1/3x - 2

Answer

y = 3x - 2

Answer

y = -3x - 2

Question 5

A speedboat travels 2,000 meters in 20 minutes at a constant speed. Which equation models the distance the speedboat travels (y) for any given number of minutes (x)?

Accepted Answer

$$y=100x$$

Answer

$$y=2000x\ +\ 20$$

Answer

$$y=20x\ +2000$$

Answer

$$y=200x$$

Question 6

Write the equation of the line.

Accepted Answer

y= -3x-3

Answer

y= -1x-3

Answer

y= -3x-1

Answer

y=-1/3x-1

Question 7

Which is the graph of the equation ?

$$y=\frac{1}{3}x\ -\ 2$$

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 8

Morgan and Brian both took a typing test. The results of each student are shown in the graph and table. Which statement about their test is true?

Accepted Answer

Brian types at a faster rate than Morgan

Answer

Morgan types at a faster rate than Brian.

Answer

They both type at the same exact rate.

Answer

Brian started the test earlier than Morgan

Question 9

What is the equation of a line when m = -3 and b = 5?

Accepted Answer

y = -3x + 5

Answer

y = -3x - 5

Answer

y = 5x + 3

Answer

y = -5x - 3

Question 10

The cost of a bounce house rental is modeled by the equation y = 400 + 30x, where x is the number of hours. What is the meaning of the y value when x = 2?

Accepted Answer

The total cost for renting the bounce house for two hours.

Answer

The initial fee incase of any damages

Answer

The cost per hour

Answer

There is a $2 fee for insurance.

Question 11

What does 10 represent in y=6x+10 ?

Accepted Answer

y-intercept

Answer

slope

Question 12

What does the 4 represent in y=4x+3 ?

Accepted Answer

slope

Answer

y-intercept

Question 13

What type of slope?

Accepted Answer

zero slope

Answer

undefined

Answer

positive slope

Answer

negative slope

Question 14

The table below shows the cost of manufacturing dry erase markers in a factory. A linear function models the cost per pencil. Which statement about the rate of change of this function is true?

Accepted Answer

The cost increases by $0.60 for each additional pencil.

Answer

The cost increases by $10 for each additional pencil.

Answer

The cost decreases by $6 for each additional pencil.

Answer

The cost increases by $4 every 20 pencils.

Question 15

An attorney charges a fixed fee of $250 for an initial meeting and then a certain amount per hour for all hours he works on a case after that. The table below shows the total amount of money (m) he makes after a certain number of hours (h) since the initial meeting. Write an equation to model this relationship.

Accepted Answer

$$m=75h\ +\ 250$$

Answer

$$m=250h$$

Answer

$$m=250h\ +75$$

Answer

$$m=75h$$

Question 16

ind x if the line through the points (6, x) and (1, -5) has a slope of 2.

Accepted Answer

$$5$$

Answer

$$-5$$

Answer

$$\frac{1}{5}$$

Answer

$$-\frac{1}{5}$$

Question 17

Colby put $100 in a savings account. The graph below shows how the amount in the account would increase over the next ten years. What does the y-intercept represent?

Accepted Answer

The initial amount of money Colby had in his account before he started to save

Answer

The amount of money he deposits into his account every month.

Answer

The amount of years he saved for.

Answer

The amount of money he loses over 10 years.

Question 18

The graph below shows the distance (y) from a Recreation center and the time (x), that Josie spent biking. What is the meaning of the slope?

Accepted Answer

Josie travels 1 mile closer to the recreation center every 4 minutes

Answer

Josie travels 1 mile further from the recreation center every 4 minutes

Answer

Josie travels 4 miles closer to the recreation center every 1 minute

Answer

Josie travels 4 miles further from the recreation center every 1 minute.

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