Proportional vs Non-Proportional Relationships

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

What is the y-intercept for the following graph and is it proportional or non-proportional?

• Proportional, b=1

• Proportional, b=-2

• Non-proportional, m= -1

• Non-proportional, b=1

Which relationship is an example of a proportional function?

• a rental company charges $80 per day and a one-time fee of $24

• a taxi ride costs $2 for the first mile and $4 for each additional mile

• a gym membership cost $30 per month and an additional annual registration fee of $75

• Beverly earns $210 a week for 4 weeks

When two ratios are equal they are .

(a)  

• Proportional

• Ratio

• Rate

• Unit Rate

Two quantities are ​ (a)   if the ratios comparing them are equivalent.

• proportional

• nonproportional

• constant of proportionality

• proportion

Two quantities are in a ​ (a)   if the two quantities vary and have a constant ratio between them.

• proportional relationship

• proportional

• unit rate

• nonproportional

• constant of proportionality

What does the y-intercept represent?

• It costs $30 for each mile drive.

• There is an initial charge of $30 for the moving van.

• There is an initial charge of $2 for the moving van.

• It costs $1 for every 2 miles driven.

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

Which graph is non-proportional?

• A

• B

• C

• D

What is the unit rate for the rain fall?

• 2 cm per hour

• 1 cm per hour

• ¹/₂ cm per hour

• 4 cm per hour