The unit rate is the rate for one unit of a given quantity.

1

Finding Unit Rate

• The unit rate is the rate for one unit of a given
  quantity.

2
Finding Unit Rate can save you money!
Unit Price Price per Item Measure or
Count of Items

• Allows shoppers to compare the prices of items
  quickly and easily

3
Genuardis
Unit Price
Unit Price 2 50 plates
Paper Plates
0.40 per plate
Unit Price 2 9 oz.
For 9 oz.
0.22 per oz.
Cereal
Unit Price 2 13.75 oz
For 13.75 oz.
0.15 per oz.
Coffee
4
Oranges 4 lb. Bag 2.99 Unit Price?
M Ms 14 oz. Bag for 2.69 Unit Price?
5
Safeway Select Detergent 300 oz. 10.99 What is
the Unit Price?
Wisk Laundry Detergent 100 oz. 4.99 What is the
Unit Price?
What is the better buy?
6
Dixie plates 2.49 24 count Unit Price (per
plate)?
Hefty plates 2 for 4.00 50 count (each
pkg.) Unit Price (per plate)?
Which is the better buy?
7
Genuardi's
Cheerios 3 for 6 13.75 oz. boxes Unit Price
(per oz.)?
Giant Food Stores
Cheerios 3 for 7.00 15 oz. boxes Unit Price (per
oz.)?
Which is the better buy?
8
Bounty 8 rolls 5.99
Thirsty 2 rolls 2.99
Now you want to compare these two brands, which
are both on sale. You have determined that you
want 8 rolls of paper towels. Which brand will
you buy?
9
Comparison Shopping Finding the Better Buy

• Finding the Better Buy is determining which
  size, store, or deal will give you the most
  product for your money
• We use Unit Prices to compare product sizes to
  find the better buy
• We also use Unit Prices to determine which store
  or deal will give us the better buy

10
Unit Rate is not just for shopping

• Amy can read 88 pages in 4 hours. What is the
  unit rate? (How many pages can she read per
  hour?)

11

• Samuel checked his heart rate. He counted 150
  beats in two minutes. Calculate his heartbeats
  per minute.

12
Did you know you were calculating slope (rate of
change) this whole time? Check it out

• Which is the better buy?
• Guss Gas Station sells gas using the following
  equation C 3.35g
• (C total cost, g of gallons)
• Sallys Station uses the following table

Gallons of Gas Total Cost
2 7
4 14
6 21