8th Grade Test Prep

Which graph represents a linear function of x?

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Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What is the value of the expression shown below?

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CCSS.8.EE.A.4

At a factory, the cost of making different numbers of toothbrushes is shown in the table below.

A linear function models the cost based on the number of toothbrushes made. Which statement about the rate of change of this function is true?

• The cost increases by $1.50 for each additional toothbrush made.

• The cost increases by $4.50 for each additional toothbrush made.

• The cost increases by $9.00 for each additional 3 toothbrushes made.

• The cost increases by $18.00 for each additional 3 toothbrushes made.

Tags

CCSS.HSF.IF.B.4

A company makes two different-sized ice cream cones. The smaller cones are 3.5 inches tall and have a diameter of 3 inches. The larger cones are 5.1 inches tall and have a diameter of 4.5 inches. About how much greater, to the nearest tenth of a cubic inch, is the volume of the larger cone than the volume of the smaller cone?

• 18.8

• 56.4

• 75.2

• 225.5

Which equation represents the line shown on the coordinate plane below?

• y=4x

• y= -4x

• y=1/4x

• y= -1/4x

Tags

CCSS.8.F.A.3

CCSS.8.EE.B.6

Triangle A and triangle B are graphed on the coordinate plane below.

Which sequence of transformations will map triangle A onto its congruent image, triangle B?

• a reflection over the x-axis, then a reflection over the y-axis

• a translation 8 units down, then a reflection over the y-axis

• a reflection over the x-axis, then a translation 6 units to the left

• a rotation 90° clockwise about the region, then translation 6 units to the left

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Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

A line is graphed on the coordinate plane below.

Line y=-x +2 will be graphed on the same coordinate plane to create a system of equations. What is the solution to that system of equations?

• (-2, 4)

• (0,-4)

• (2, -4)

• (4, -2)

Tags

CCSS.8.EE.C.8B

Rectangle A′B′C′D′ is similar to rectangle ABCD, as shown on the coordinate plane below.

Which sequence of transformations maps rectangle ABCD onto rectangle A′B′C′D′?

• a translation 8 units to the left, then a dilation by a scale factor of 1/2 with a center of dilation at the origin

• a reflection of the y-axis, then a dilation by a scale factor of 1/2

  with a center of dilation at the origin

• a dilation by a scale factor of 1/2 with a center of dilation at the origin, then a 90° counterclockwise rotation about the origin

• a 90° counterclockwise rotation about the origin, then a dilation by a scale factor of 1/2 with a center of dilation at the origin

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

Which statement best describes the data in a scatter plot where the y-values are decreasing as the x-values are increasing?

• The data can best be modeled by a vertical line.

• The data can best be modeled by a horizontal line.

• The data can best be modeled by a line with a positive slope.

• The data can best be modeled by a line with a negative slope.

Which proportional relationship has the greatest rate of change?

• y=7x

• The value of y increases by 12 for every increase of 4 in the value of x.

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Tags

CCSS.8.EE.B.5