Section 2.6Write Ratios and

Proportions

A backpacker in the Sierras hikes 5.5 miles in 2 hours. If the hiking rate remains the same, how far will the backpacker hike in 7 hours?

Example 1

Uses division to compare two quantities. Can write the ratio of two quantities a and b in three ways:

Ratios

At a carwash fundraiser, 18 ninth grade students and 14 tenth grade students worked the first shift

A. Find the ratio of ninth grade students to tenth grade students.

B. Find the ratio of ninth grade students to all students.

Example 2

Equation that states two ratios are equivalent

Proportions

a c

b d

What must be true though??

A.

B. 12 is to 18 as d is to 27.

Example 3Solve the following:4

35 7

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HW #16 Ratio and Proportion Worksheet

Weekend Fun

Example 4Solve the proportion

5 4

13 39

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