1. A

2. B

3. C

4. D0% 0%0%0%

The table shows the population for the town of Cedar Creek from 1990 to 2001. Which choice shows a line graph for the set of data?

A. B.

C. D.

(over Lesson 8-6)

Main Idea and Vocabulary

Example 1:Predict Using Percent Proportion

Example 2:Predict Using Percent Equation

• Survey – designed to collect data about a specific group of people

• Population – a specific group of people

• Predict actions of a larger group by using a sample (2.6.8B) (M7.E.4.1).

PETS The table shows the results of a survey in which people were asked whether their house pets watch television. There are 540 students at McCloskey Middle School who own pets. Predict how many of them would say their pets watch TV.

You can use the percent proportion and the survey results to predict the number of people who would say their pets watch TV.

Answer: About 205 students would say their pets watch TV.

Simplify.

Cross productsentirepopulation

part of the population

1. A

2. B

3. C

4. D

0% 0%0%0%

A. about 12 students

B. about 32 students

C. about 83 students

D. about 228 students

VIDEO GAMES In a survey of middle school students, 32% responded that playing video games was their favorite after-school activity. Predict how many of the 260 students surveyed said that playing video games was their favorite after-school activity.

SUMMER JOBS According to one survey, 25% of high school students reported they would not get summer jobs. Predict how many of the 948 students at Mohawk High School will not get summer jobs.

You need to predict how many of the 948 students will not get summer jobs.

n = 0.25 ● 948Write the percent equation.

n = 237Multiply.

Words What number is 25% of 948?

Variable Let n represent the number.

Equation n = 0.25 ● 948

Answer: You could predict that about 237 of the students at Mohawk High School will not get summer jobs.

1. A

2. B

3. C

4. D

0% 0%0%0%

A. about 163 employees

B. about 275 employees

C. about 310 employees

D. about 362 employees

SEASONS According to one survey, 31% of adults consider spring to be their favorite season of the year. Predict how many of the 525 employees of a large corporation would respond that spring is their favorite season of the year.

1. A

2. B

3. C

4. D

0% 0%0%0%

A. 33,698

B. 29,674

C. 21,658

D. 17,958

According to the survey, 73% of adults 21–30 years old own at least one car. For a city with about 24,600 adults age 21–30 years, predict how many own a car.

REVIEW

End of the Lesson

Five-Minute Check (over Lesson 8–6)

Image Bank

Math Tools

Line Plots