Unit 5 Review: Proportional Relationships

Which graph shows a proportional relationship between x and y?

• A
• B
• C
• D

Which equation shows a proportional relationship between x and y?

• y = 3x + 9
• y = 1/2x
• y = 1/2x - 2
• y = x²

Find the unit rate:  $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

• $1.00 per pound
• $3.60 per pound
• $1.20 per pound
• $1.10 per pound

A factory uses 220,000 gallons of water to produce 2 tons of steel. How many gallons of water are needed to produce 1 pound of steel? 

• 55 gallons
• 110 gallons
• 110,000 gallons
• 440,000 gallons

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

What is the constant of proportionality?

• $3
• $4
• $2
• $9

What makes a graph proportional?

• Linear
• The line goes through the origin
• Curvy line
• Linear and the line goes through the origin

How do you find the unit rate of the data?

• Divide
• Multiply
• Add
• Subtract

Is this table proportional?

• Yes
• No

What is the constant of proportionality?

• 8
• 16
• 24
• 2