8th STAAR Review #1

Which of the functions below is a non-proportional linear relationship between x and y?

• y=x²

• y = 4x

• y=2x+5

• y=25x

The coordinate grid shows a pentagon. The pentagon is translated 1 unit to the left and 10 units down to create a new pentagon. Which rule describes this transformation?

• (x, y) → (x + 1, y − 10)

• (x, y) → (x − 1, y − 10)

• (x, y) → (x + 1, y + 10)

• (x, y) → (x − 1, y + 10)

Two numbers are shown on the number line.

Which value is NOT located between these two numbers on the number line?

• _√9

• pi/9

• pi

• pi²/9

Triangle MNP is graphed on a coordinate grid with vertices at M (−3, −6), N (0, 3) and P (6, −3). Triangle MNP is dilated by a scale factor of u with the origin as the center of dilation

to create triangle M′N′P′. Which ordered pair represents the coordinates of the vertex P′?

• (6u, −3u)

• 
• 
• (6 + u, −3 + u)

The table shows the number of gallons of gasoline in a car’s gas tank after the car has been driven x miles.

When these data are graphed on a coordinate grid, the points all lie on the same line. What are the slope and y-intercept of this line?

• Slope = 25, y-intercept = 375

• Slope = −25, y-intercept = 15

• Slope = −1/25, y-intercept = 15

• Slope = 1/25, y-intercept = 375

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

A cylinder and its dimensions are shown in the diagram.

Which equation can be used to find V, the volume of the cylinder in cubic inches?

• V = π(2.5 h)²

• V = π(5h)²

• V = π(2.5)²h

• V = π(5)²h

The manager of a car dealership wants to attach a rope with flags to the top of a pole and to a stake in the ground, as shown in the diagram. Based on the diagram, what is the distance in feet from the top of the pole to the bottom of the stake?

• 32.5 feet

• 17.2 feet

• 45.5 feet

• 6.5 feet

The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries. Based on the scatterplot, what is the best prediction of the average amount of money spent on groceries for a household that has 7 people?

• 240

• 190

• 210

• 300

What value of x makes this equation true?

• 3

• -9

• -1

• 27

An eighth-grade student estimated that she needs $8,800 for tuition and fees for each year of college. She already has $5,000 in a savings account. The table shows the projected future value of the account in five years based on different monthly deposits.

The student wants to have enough money saved in five years to pay the tuition and fees for her first two years of college. Based on the table, what is the minimum amount she should deposit in the savings account every month?

• $200

• $300

• $100

• $400