1. $25 50 Miles 2 hours 1Hour Lesson 6-2 Rates
Students will be able to solve problems involving rates.
$25
2 hours
50 Miles
1Hour

2. Simplify rates so the denominator is 1 So the unit rate of 100 words
2 minutes ÷
Rate: A ratio that compares two
quantities with different kinds of units! 2 ÷
Simplify rates so the denominator is 1
To simplify rates so the denominator is 1 just divide the numerator by the denominator. 50
100 ÷ 2 =
50 words
1 minute
So the unit rate of 100 words
2 minutes is
If the numerator is a decimal that’s okay!

3. Unit Rates Find the unit rate: 24 mi 3h ÷ 3 ÷3 8 mi 1 h
Unit Rate: a rate that is simplified so that it has
a denominator of 1 unit!
Find the unit rate:
24 mi 3h
÷ 3 ÷3
8 mi
1 h
Read as 8 miles per 1 hour!

4. Found on page 287 in your book!
Common Unit Rates
Found on page 287 in your book!
Rate
Unit Rate
Abbreviation
Name
Number of miles
1 hour
Miles per hour
Mi/h or mph
Average speed
1 gallon
Miles per gallon
Mi/gal or mpg
Gas Mileage
Number of dollars
1 pound
Price per pound
Dollars/lb or $/lb.
Unit Price
Dollars per hour
Dollars/hr or $/hr
Hourly wage
When determining units rates involving Dollars it is generally more helpful to find dollars/ unit!

5. Which is a better buy? $1.28 $2.56 16 oz 64 oz
Amount
Total cost
16 oz Orange Juice
$1.28
64 oz Orange Juice
$2.56
To find the lowest price, find and compare the unit price for each container.
How do we set it up as a rate? 16oz OR $1.28
$ oz
$ $2.56
16 oz oz
How do we find the unit rates? Just divide numerator by denominator
Divide the numerator by the denominator!

6. Which is a better Buy continued!.
$1.28
16 oz 8
So, the unit price of the 16 oz container is:
$.08/oz 16
1.28
−128
000 .
$2.56
64 oz 4
What is the unit rate for the 64 oz container? 64
2.56
$.04/oz
─256
000
Which is a better buy?

7. First find the unit rate!
Kyle ate 12 hot wings in 4 minutes at Wild Buffalo Wings. At this rate how many wings can he eat in 7 minutes?
First find the unit rate!
÷ 4=
12 wings
4 minutes
3 wings
1 minute
Now we know that Kyle can eat 3 wings per minute, so how many can he eat in 7 minutes?
What do you do?
Multiply the unit rate by 7 minutes! x
3 wings
1 minute
21 wings
7 minutes =
Divide out the common units!
Kyle can eat 21 wings in 7 minutes!

8. Homework Time:
Pgs
Pblms all, & 22