Course 2, Lesson 2-1

1. There are 2 grams of fat in 1 pound of chicken. There are 9 grams of fat

in 4.5 pounds of chicken. How many grams of fat would be in 10 pounds

of chicken?

2. Determine whether the linear function is a direct variation. If so, state the

constant of variation.

3. What is the constant of variation

of the linear function.

Pay $15 $22.50 $30 $37.50

Hours 2 3 4 5

Course 2, Lesson 2-1

ANSWERS

1. 20 grams

2. yes, 7.5

3. 25

HOW can percent help you understand situations involving money?

Ratios and Proportional Relationships

Course 2, Lesson 2-1

Ratios and Proportional Relationships

Course 2, Lesson 2-1 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.3Use proportional relationships to solve multistep ratio and percent problems.

• 7.EE.3Solve multistep real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies.

Ratios and Proportional Relationships

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

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.

How to:•Find the percent of a number•Use percents greater than 100%

Ratios and Proportional Relationships

Course 2, Lesson 2-1

How did what you learned today help you answer the

HOW can percent help you understand situations involving money?

Course 2, Lesson 2-1

Ratios and Proportional Relationships

How did what you learned today help you answer the

HOW can percent help you understand situations involving money?

Course 2, Lesson 2-1

Ratios and Proportional Relationships

Sample answers:• If you write the percent as a fraction or decimal and

then multiply by a number, you can find the percent of a dollar amount.

What is 1.4% of 25?

What steps did you useto find your answer?

Ratios and Proportional Relationships

Ratios and Proportional Relationships

Course 2, Lesson 2-1