Course 2, Lesson 1-1

Find the mean, median, and mode for each data set. Round to the

nearest tenth if necessary.

1. number of cars in household:

1, 3, 2, 0, 2, 1, 6, 3, 2, 2, 0, 1

2. Time (minutes) spent exercising:

60, 30, 45, 60, 45, 50, 20, 0, 60, 30

3. The mean of a set of 12 numbers is 14.8. What is the sum of the

numbers?

4. Which measure best represents the following data set?

39, 43, 45, 46, 41, 40, 44, 47, 42

Course 2, Lesson 1-1

ANSWERS

1. 1.9; 2; 2

2. 40; 45; 60

3. 177.6

4. Mean

HOW can you show that two objects are proportional?

Ratios and Proportional Relationships

Course 2, Lesson 1-1

Ratios and Proportional Relationships

Course 2, Lesson 1-1 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

• 7.RP.2Recognize and represent proportional relationships between quantities.

• 7.RP.2bIdentify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.

Mathematical Practices

1 Make sense of problems and persevere in solving them.

3 Construct viable arguments and critique the reasoning of others

4 Model with mathematics.

5 Use appropriate tools strategically.

•To find a unit rate• To determine the lowest price

Ratios and Proportional Relationships

Course 2, Lesson 1-1

Ratios and Proportional Relationships

Course 2, Lesson 1-1

•rate

•unit rate

How did what you learned today help you answer the

HOW can you show that two objects are proportional?

Course 2, Lesson 1-1

Ratios and Proportional Relationships

How did what you learned today help you answer the

HOW can you show that two objects are proportional?

Course 2, Lesson 1-1

Ratios and Proportional Relationships

Sample answers:• By writing a rate as a unit rate

Explain how tofind a unit rate.

Ratios and Proportional Relationships

Ratios and Proportional Relationships

Course 2, Lesson 1-1