Show:
Ratios
Rate
Better Buy/Rate/Unit Rate
Equivalent Ratios
Constant of Proportionality
100

What is a unit rate?

A rate for every 1 unit.

Some measure per 1 unit of another measure.

100
Adam spent $2.01 on 3 pounds of bananas. Ben spent $3.45 on 5 pounds of apples. Who had the better buy? Show all work!
Adam.
100

A helicopter propeller spins 2400 revolutions in 4 minutes. What is the constant of proportionality (k), in revolutions per minute?

The constant of proportionality is k = 600 RPM

200
What is the difference between a ratio and a rate? Give an example of each.
A rate compares different units of measure while a ratio compares the same units of measure. (Examples vary)
200
If you can read 380 words in 5 minutes, what is your unit rate?
76 words per minute
200
Which is the better buy? 18 pens for $6.84 or 30 pens for $8.40? (Show all work!)
30 pens for $8.40
200
Kristina walks for 4 minutes after every 28 minutes of running. Jenny walks for 3 minutes after every 21 minutes of running. Are their ratios of walking time to running time equivalent? Show your work.
Yes 1/7 = 1/7
200

Navelle earns $12 per hour. Write an equation that represents Navelle's earnings.

 y = 12 times x 

Pay = 12 x number of hours

300
If there are 14 red Skittles, 15 green Skittles, and 21 purple Skittles, the ratio of green to total is 3:10. True or False?
True: 15:50 simplifies to 3:10
300
Dennis paid $42.98 for 14 gallons of gas. What is the price per gallon?
$3.07 per gallon
300

Which is the best deal? 6 shirts for $25.50 or 5 shirts for $21.00? Show all work.

5 shirts for $21.

300
Which of the following ratio are not equivalent to the ratio 4:9? 16:36, 20:40, 2:5, 24:54?
20:40 and 2:5
300

Maxine works at law office. The equation y = 135x represents her earnings. y = total pay, x = hours worked. Determine how much money she makes if she works 40 hours.

Maxine earns $5,400 in 40 hours.



400
The Giants won 8 games, lost 6 games, and tied 4 games. Write a ratio (in simplest form) of wins and ties to total games.
12 to 18 = 2 to 3
400
If 7 pounds of apples cost $13.16, how much will 10 pounds of apples cost?
$18.80
400

Ashley is going to ride her bike to a friend's house that is 96 miles away. She is riding at an average rate of 15 miles per hour. She has 6 hours to get there. Will she make it on time? Show all work.

No - she will only be able to travel 90 miles in 6 hours.

400
If Joey spent $28 on 5 pounds of candy, how much will 8 pounds of candy cost?
$44.80
500
Beth can run 3.2 miles in 25 minutes. How many miles can she run in an hour?
7.68 miles
500
Ed drives from Jefferson to Holden, a distance of 250 miles. He then drives on to Paxton, which is 50 miles from Holden. If it takes him 5 hours to complete the entire trip, how fast is he traveling if he is traveling at a constant speed?
60 mph
500

Steven works the same amount of hours each day. On Monday, he got paid $89.50 for ten hours. How much money will he make in total after three days and 2 hours?

$286.40 in total