Real Life Problems About Proportional and Non-Proportional Relationship

Which of the situations below represents a non-proportional relationship?

• total distance traveled and number of hours traveled, if John drove his car at a constant rate of 60 miles per hour

• total earnings and number of hours spent babysitting, if Carrie babysat at a rate of $8 per hour

• total fees charged and number of carpeted rooms cleaned, if a carpet cleaning company charges $40 for the first room and $25 for each additional room

• total savings and number of weeks spent saving, if Jeremy saved $10 each week

What is the constant of proportionality for the graph?

• 1

• 2

• 60

• 120

Does the equation show a proportional relationship?

• Yes

• No

Does the equation show a proportional relationship?

• Yes

• No

Does the graph show a proportional relationship?

• Yes

• No

Which graph is non-proportional?

• A

• B

• C

• D

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

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

• Proportional

• Not Proportional

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

• 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