Solving and Graphing Proportional Relationships

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

• Taylor can write 6 words per minute
• Taylor can write 25 words per minute
• Taylor can write 50 words per minute
• Taylor can write 150 words per minute

What is the constant rate of change?

• Not here.

• $80 per month.

• $82 per month.

• $41 per month.

What is the constant of proportionality?

• $3

• $4

• $2

• $9

 Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

Is this table proportional?

• Yes

• No

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional

Which graph is non-proportional?

• A

• B

• C

• D