2017 STAAR 8th Grade Math PART 1

Which graph shows a non-proportional linear relationship between x and y?

• 
• 
• 
• 

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?

• π

• 
• π / 9

• π² / 9

A water hose discharges water at a rate of 45 gallons per minute. Which graph has a slope that best represents this rate?

• 
• 
• 
• 

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′?

• (6 + u, −3 + u)

• 
• 
• (6u, −3u )

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 = 1/25, y-intercept = 375

• Slope = − 1/25, y-intercept = 15

• Slope = 25, y-intercept = 375

• Slope = −25, y-intercept = 15

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 (2.5h)²

• V = π (5h)

• V = π (2.5)²h

• V = π (5)²h

The approximate volume in milliliters, m, for a volume of f fluid ounces is equal to 29.57 times the value of f. Which table represents this relationship?

• 
• 
• 
• 

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?

• 22

• 30

• 32.5

• 42.5

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