Review

Students in Mr. Grabarek's Advisory class at Willowcreek wanted to find out the favorite video game of all the students at the school. How could they generate a random sample to survey?

• Choose the first 15 students in Mr. Chlebowski's office 

• Pick 30 6th grade boys that are in Ms. Alvarado's class

• Ask ten 8th graders who get to lunch first 

• Select every 5th student on a list of all of the students at Willowcreek

Raul randomly surveys students in his school and finds that 12 out of 150 students favorite basketball team is the Los Angeles Lakers. If there are 800 students in his school, about how many students are expected to have the Los Angeles Lakers be their favorite basketball team?

In a sample of voters in Harrisburg, 18 out of 25 favored creating a new shopping center. If 50,000 people vote in the next Harrisburg election, how many are likely to vote in favor of the new shopping center based on this sample?

• 40,000
• 14,000
• 36,000
• 28,000

In a random sample of 50 pieces of fruit from a market, 20 pieces are apples. Predict the total number of apples if the market has 500 pieces of fruit.

• 200

• 100

• 150

• 250

Answer explanation

To find the total number of apples in 500 pieces of fruit, we can set up a proportion: 20 apples in 50 fruit is the same as x apples in 500 fruit. Solving for x gives us 200 apples.

What is the scale factor used to get from the small rectangle to the large rectangle?

• 4

• .25

• 21

• 5/7

If the scale factor to get from the small rectangle to the large rectangle is 4 and the perimeter of the small rectangle is 24 units. What is the perimeter of the larger rectangle?

• 112

• 24

• 96

• 32

Triangle PRQ is the pre-image. Triangle SUT is the image. What is the scale factor to get from the small triangle to the large triangle?

• 2

• 1.5

• .67

• 8/12

What is the scale factor?

• 4
• .25
• 5
• 6

If the perimeter of a rectangle was 20in and now it is is 80in, what is the scale factor that was used?

• 4

• 2

• 40

• 20

Amanda made a scale drawing of a square garden, which has a side length of 25 feet. She used the scale 2 inches = 5 feet.

What will be the area of the scale drawing?

• 10 in²
• 25 in²
• 100 in²
• 484 in²