8th Grade Mathematics Practice Test 2-24

• 4

• 8

• 16

• 21

Tags

CCSS.MATH.CONTENT.8.EE.A.2

Given: ( triangle DEF ) is located on the coordinate plane. ( angle D ) measures 136°. If the triangle is rotated 90° counterclockwise about the origin to form

( triangle D'E'F' ), what is the measure of ( angle D' )?

• 46°

• 90°

• 136°

• 226°

Answer explanation

When a triangle is rotated 90° counterclockwise, the angle measures remain the same. Therefore, the measure of angle D' is also 136°.

Tags

CCSS.MATH.CONTENT.8.G.A.1.b

The table represents a company’s digital music revenue for six years. Amy correctly made a scatter plot of the data in the table. Which statement is true based on her scatter plot?

• There is at least one outlier.

• There is a nonlinear association.

• There is a positive linear association.

• There is a negative linear association.

Answer explanation

The scatter plot shows a positive trend, indicating a positive linear association between the digital music revenue and the years.

Tags

CCSS.MATH.CONTENT.8.SP.A.1

Which ordered pairs should be removed to make the graph a function?

• (-2, 4) and (11, -7)

• (6, 5) and (6, 7)

• (3, 3) and (6, 3)

• (1, 1) and (6, 7)

Answer explanation

The ordered pairs (6, 5) and (6, 7) should be removed to make the graph a function, as they have the same x-value but different y-values, violating the definition of a function.

Tags

CCSS.MATH.CONTENT.8.F.A.1

Select the choice that identifies the number as rational or irrational.

• Rational

• Irrational

Answer explanation

The correct choice is 'Rational' because the number is a rational number.

Tags

CCSS.MATH.CONTENT.8.NS.A.1

Select the choice that identifies the number as rational or irrational.

• Rational

• Irrational

Answer explanation

The correct choice is 'Irrational' because the number is not expressible as a ratio of two integers.

Tags

CCSS.MATH.CONTENT.8.NS.A.1

Select the choice that identifies the number as rational or irrational.

• Rational

• Irrational

Answer explanation

The correct choice is Rational because the number is either a terminating or repeating decimal, which makes it a rational number.

Tags

CCSS.MATH.CONTENT.8.NS.A.1

Select the choice that identifies the number as rational or irrational.

• Rational

• Irrational

Answer explanation

The correct choice is Irrational because the number cannot be expressed as a ratio of two integers.

Tags

CCSS.MATH.CONTENT.8.NS.A.1

Select the choice that identifies the number as rational or irrational.

• Rational

• Irrational

Answer explanation

The correct choice is Rational because the number can be expressed as a fraction of two integers.

Tags

CCSS.MATH.CONTENT.8.NS.A.1

A nanometer can be expressed as 1 x 10⁻⁹ meters, and a millimeter can be expressed as 1 x 10⁻³ meters. How many times larger is a millimeter than a nanometer?

• 10,000

• 100,000

• 1,000,000

• 10,000,000

Answer explanation

A millimeter is 1,000,000 times larger than a nanometer because 10⁻³ / 10⁻⁹ = 10⁶.

Tags

CCSS.MATH.CONTENT.8.EE.A.3