Unit Rates, Conversions & Proportions

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $35 per pound

• $5 per pound

• $0.125 per pound

It cost me $46.80 to fill my 13-gallon gas tank. What was the price of gas per gallon?

• $3.60

• $3.55

• $3.40

• $3.50

Which is the better buy? A 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

• The 12-pack

• The 6-pack

• They're the same

• Neither, I prefer Coke

A unit rate is a rate in which the unit in the denominator is:

• 0

• 3

• 1

• 2

You go to the grocery store to buy dog food. The store has three sizes available:

A 20-lb bag for $23.44

An 8-lb bag for $9.88

A 40-lb bag for $49.00

Which size bag has the lowest cost per pound rounded to the nearest cent?

• The 8-lb bag

• The 20-lb bag

• The 40-lb bag

• I have a cat

Solve.

• 3

• 6

• 12

• 15

Solve.

• 8

• 9

• 32

• 64

Solve the proportion.

• 1
• 3
• 6
• 5

345 ft/min = ________ ft/hour

• 20,700 feet/hour
• 5.75 feet/hour

64 miles/hour ≈ ___________feet/second

• 337,902 feet / second
• 93.86 feet / second
• 5632 feet / second