Grade 8 Math STAAR 2024 Part 1

A marble is in the shape of a sphere with a diameter of 13 millimeters.

Which measurement is closest to the volume of the marble in cubic millimeters?

• 1,150 mm³

• 863 mm³

• 6,902 mm³

• 9,203 mm³

Which list shows the numbers in order from greatest value to least value?

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Which graph does NOT represent y as a function of x?

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A company employee had to read several financial reports. The scatterplot shows the lengths and reading times for those reports.

Which prediction of the time in minutes to read a 90-page report is best supported by the data?

• 95 min

• 105 min

• 125 min

• 155 min

The table shows several pairs of x- and y- values for a linear relationship.

Create an equation in slope-intercept form that can be used to model this relationship.

y = ​ (a)   x +​ (b)  

• 2
• -2
• -1
• 8

Quadrilateral PQRT and quadrilateral KLMN are similar.

Which proportion must be true?

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Shakira has an investment account that she deposits $200.00 into each year. The table shows the amount of interest she earns in dollars and the ending balance each year.

Shakira continues to deposit $200.00 each year and earns the same interest rate for several years. Which statement about the ending balance each year is true?

• The balance increases by 2% of the sum of $200.00 and $204.00 every year.

• The balance increases by 2% of $200.00 every year.

• The balance increases by 2% of the prior year's ending balance.

• The balance increases by 2% of the sum of the prior year's ending balance and $200.00.

A triangular prism and its dimensions in feet are shown.

What is the total surface area of the prism in square feet?

• 456 ft²

• 672 ft²

• 768 ft²

• 576 ft²

A tank starts off containing 1,060 gallons of water, and 35 gallons of water leaks from the tank every hour. At the same time, an empty pool is filled with water at a rate of 480 gallons per hour.

Which inequality represents all possible values for x, the number of hours that have passed when the tank contains less water than the pool?

• 1,060 + 35x > 480x

• 1,060 - 35x > 480x

• 1,060 - 35x < 480x

• 1,060 + 35x < 480x

Triangle PQR is dilated with the origin as the center of dilation to create triangle P'Q'R'.

Complete the rule to represent the dilation from triangle PQR to triangle P'Q'R'.

Move the correct answer to each box. N​ot all answers will be used.

(x, y) ---> (​ (a)   ,​ (b)   )

• 3x
• 3y
• 2x
• 6x
• 2y
• 6y