8th Grade MATH STAAR

Trapezoid WKRP was translated 4 units to the left and 5 units up on a coordinate grid to create trapezoid W'K'R'P'. Which rule describes this transformation?

• (x y, ) → (x − 4, y + 5)

• (x y, ) → (x + 4, y − 5)

• (x y, ) → (x + 4, y − 5)

• (x y, ) → (x − 4, y − 5)

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CCSS.HSG.CO.A.2

Which representation shows y as a function of x?

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CCSS.8.F.A.1

CCSS.8.F.B.5

A bowling ball shaped like a sphere has a diameter of 21.6 centimeters. Which measurement is closest to the volume of the bowling ball in cubic centimeters?

• 1,954.3 cm 3

• 5,276.7 cm 3

• 488.6 cm 3

• 42,213.4 cm 3

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CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

A customer will borrow $12,000 to buy a car. Which loan option would allow the customer to pay the least amount of interest?

• A 4-year loan with a 5.2% annual simple interest rate

• A 5-year loan with a 4.2% annual simple interest rate

• A 6-year loan with a 4.7% annual simple interest rate

• A 3-year loan with an 8.4% annual simple interest rate

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CCSS.8.F.B.4

CCSS.8.F.A.2

5Which table represents a non-proportional relationship between x and y?

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CCSS.8.F.B.4

CCSS.8.F.A.2

CCSS.8.F.A.3

Triangle TRW is shown on the coordinate grid.

Triangle TRW will be dilated by a scale factor of n with the origin as the center of dilation to create triangle T'R'W'. Which ordered pair best represents the location of point R'?

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• ( 3− n, −5n)

• ( -3 + n, −5 + n)

• ( -3 − n, − 5 -n)

Tags

CCSS.8.G.A.3

A student’s parents invested $5,000 in a college savings account that pays 4.85% annual simple interest. No additional deposits or withdrawals will be made. Which amount is closest to the interest earned on the account at the end of 15 years?

• $5,174.11

• $10,174.11

• $3,637.50

• $8,637.50

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

Triangle XYZ is rotated 90° clockwise about the origin to form triangle X Y′ ′Z′.

Which statement is true?

• The sum of the angle measures of triangle XYZ is 90° less than the sum of the angle measures of triangle X Y′′′ Z .

• The angle measures of triangle XYZ are less than the corresponding angle measures of triangle X Y′′′ Z .

• Triangle XYZ is not congruent to triangle X Y′′′ Z .

• The area of triangle XYZ is equal to the area of triangle X Y′′′ Z .

Tags

CCSS.8.G.A.3

A college has two classrooms of students.

• Classroom A had 70 students.

• Classroom B had 30 students.

• Classroom A sent groups of 4 students to Classroom B until both classrooms had the same number of students.

The equation shown can be used to find the number of groups that Classroom A sent to Classroom B so each classroom had the same number of students.

70 - 4x = 30 + 4x

How many groups did Classroom A send to Classroom B?

Tags

CCSS.3.MD.A.1

A water tank currently contains 275 gallons of water. The amount of water in the tank will decrease at a constant rate of 15 gallons per week.

Which function can be used to find t, the total number of gallons of water in the tank after w weeks?

• t = 15w − 275

• t = −15w + 275

• t = 275w − 15

• t = −275w + 15

Tags

CCSS.4.MD.A.2