Connecting Proportional Relationships and the Equation of a Straight Line

Write an equation for this relationship.

• y=1/5x
• y=1/2x
• y=2x
• y=5x

Write an equation for this relationship.

• y=1/5x
• y=1/2x
• y=2x
• y=5x

Which line shows a proportional relationship between x and y?

• Line L
• Line M

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

Which graph is non-proportional?

• A
• B
• C
• D

The cost of 4 pounds of grapes is $24.36. What is the constant of proportionality that relates cost in dollars, y, to the number of pounds of grapes, x?

• 6.09
• 20.36
• 8.12
• 28.36

What makes a graph proportional?

• Straight Line
• The line goes through (0,0)
• Curvy line
• Straight line and passes through (0,0)

Is the graph proportional or non proportional?

• proportional
• non proportional

What is the constant of proportionality?

• 15
• 5
• 75
• 25