Representing Proportional Relationships Warmup 2

• proportional
• non-proportional

• proportional
• non-proportional

On a two-week job, a repairman works a total of 70 hours. he charges $75 plus $40 per hour. Which equation shows his rate of pay?

• y = 40x +75

• y = 75x + 40

• y = 45x + 70

• y = x

These two lines are graphs of nonproportional relationships. What makes them nonproportional?

• They are not straight

• They are not linear

• They do not go through the origin

• They do not show a constant rate of change

Why does this graph show a non-proportional relationship?

• Because it is proportional
• It goes through the origin
• It does not go through the origin
• It is a straight line

Identify whether the graph represents a  proportional or non-proportional relationship.

• Proportional Relationship
• Non-Proportional Relationship

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx
• 10=k
• y=10k
• y=10x