PSA8QB5 - Grade 8 Mathematics Practice Test 2017
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Rae made a table of x and y values. The relationship between the x and y values in Rae’s table is not a function. One of the values of x is missing from Rae’s table, as shown.

 

 

What is one value of x that Rae could use to complete her table to show that the relationship between x and y is not a function?

 

Enter your answer in the box.

Type your answer below as a number (example: 5, 3.1, 4 1/2, or 3/2):
Part A)

 

Jason is comparing the sizes of Earth, Saturn, and a lacrosse ball. The radius of Earth is approximately 6,378,100 meters.

 

Part A

 

What is the radius of Earth, in meters, written as a single-digit number multiplied by a power of 10? Enter your answer in the space provided. Enter only your answer.

Type your answer below:
Part B)

Part B

 

The radius of Saturn is approximately 6 × 107 meters.

Use your answer from Part A to estimate how many times greater the radius of Saturn is than the radius of Earth. Show or explain how you got your answer.

Enter your answer and your work or explanation in the space provided.

Type your answer below:
Part C)

Part C

 

The radius of a lacrosse ball is approximately 0.032 meter.

Estimate the radius of a lacrosse ball, in meters, by expressing the radius as a single-digit number multiplied by a power of 10.

Enter your answer in the space provided. Enter only your answer.

Type your answer below:
Part D)

Part D

 

Use your answers from Parts A and C to estimate how many times greater the radius of Earth is than the radius of a lacrosse ball. Show or explain how you got your answer.

Enter your answer and your work or explanation in the space provided.

Type your answer below:

 

A researcher surveyed 500 people and asked these two questions:

 

• Are you left-handed or right-handed?

• Do you prefer scary movies or comedies?

 

This table shows the results of the survey.

 

Based on the results of the survey, what is the relative frequency of left-handed people who prefer comedies to all people who prefer comedies?

 

Select one:

 

In a park, the locations of a drinking fountain, a streetlight, and a flagpole form a right triangle. The drinking fountain is 12 yards north of the streetlight, and the flagpole is 5 yards east of the drinking fountain, as shown in this diagram.

 

 

What is the shortest distance from the streetlight to the flagpole?

Select one:

Which of the following is an irrational number?

 

 

Select one: