Unit Rates & Proportional Relationships

Tommy has a bag of LEGOS.  There are 6 yellow, 3 red, and 8 blue LEGOS.  What is the ratio in simplest form of red to yellow LEGOS?

• 1/2
• 6/3
• 2/1
• 3/6

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

You're throwing a party, and you ordered 15 pizzas for your guests. Your total came to $97.50. What was your unit cost per pizza?

• $4.95 per pizza

• $5.75 per pizza

• $7.25 per pizza

• $6.50 per pizza

What is the constant of proportionality?

• $3
• $4
• $2
• $9

Is the given table a proportional relationship? If so, what is the constant of proportionality?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Simplify the ratio: 50 : 30

• 5 : 3

• 20 : 30

• 10 : 25

• 4 : 5

Simplify the ratio:  undefined 

Find the unit rate: 80 miles in 5 hours.

• 16 mi. per hour or undefined

Find the unit rate: $240 for 4 gifts

At the supermarket you can buy 5 bags of apples for $23. What is the unit rate for dollars per bag of apples?

• $4.60 for 1 bag

• $2.30 for 1 bag

• $5 for 1 bag

• $5.50 for 1 bag