Graphing Proportional Relationships

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

Which graph is non-proportional?

• A

• B

• C

• D

What makes a graph proportional?

• Straight Line

• The line goes through (0,0)

• Curvy line

• Straight line and passes through (0,0)

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change, and if so what is it?

• Yes, 10 calls per minute

• Yes, $.10 per minute

• Yes, $.40 per minute

• Not a constant rate

Which company shows a greater rate of change?

• Water's Edge Rafts

• Ryan's Rafts

What is the constant of proportionality?

• $3

• $4

• $2

• $9

How do you calculate slope using a graph?

• rise over run

• run over rise

• look at the y intercept

• look at the x intercept

Find the slope of the line.

• 1/2

• -1/2

• 2

• -2

Find the slope

• -5/7

• 7/5

• -7/5

• 5/7

find the slope

• 3/2

• -3/2

• (-0,-3)

• none of the above