Graphing Proportional Relationships Review

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

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2

• -1/2

• 2

• -2

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

• -5/7

• 7/5

• -7/5

• 5/7

find the slope

• 3/2

• -3/2

• (-0,-3)

• none of the above

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

• Proportional

• Not Proportional

Does this table represent a proportional relationship?

• Yes - there is a constant of proportionality

• No - there is not a constant of proportionality