1. 5.1 Ratios and Rates
9/22/16

2. Definitions Ratio: a comparison of two quantities using division
Example: 3 to 4, 3:4,
Rate: a ratio of two quantities with different units
Example:
Unit rate: a rate with a denominator of 1
Example: 40 miles per hour,
*All of these should be simplified when possible

3. Example 1- Find the unit rate.
Skippy the Snail raced Slimy the Slug. Skippy went 3 inches in 10 seconds. Slimy went 1 foot in 1 minute. Who was faster?

4. Example 3 (finding a rate from a table)
The ratio table shows the costs for different amounts of artificial turf. Find the unit rate in dollars per square foot.
Amount (square feet) 25
100
400
1600
Cost (dollars)
6400

5. Example 4 (finding a rate from a graph)
What was the speed of the bicycle from:
9-11? ? 1-4?

6. Example 5
You mix half a cup of yellow paint for every three-quarters of a cup of blue paint to make green paint. You want 15 cups of green paint. How much yellow paint and blue paint do you use?
*See also: table method for these problems, p Use either on homework #s 34 & 38