Proportional Relationships and Percentages

Shawn makes $7.50 an hour to babysit for her next door neighbors.  Describe the graph of this relationship.

• Proportional

• Non-proportional

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

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

• Proportional

• Not Proportional

What is the constant ratio or constant of proportionality (in miles per hour) based on the table?

• 45

• 90

• 135

• 2

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

In the equation y = 14x, what is the constant ration or constant of proportionality?

• y

• x

• 14

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

What is the formula for calculating percent change?

• New Value + Old Value / Old Value

• New Value - Old Value / New Value

• New Value * Old Value / 100

• ((New Value - Old Value) / Old Value) * 100

Aria had 50 apples. After a fruitful harvest, she now has 70 apples. Calculate the percent change in the number of apples Aria has.

• 40%

• 10%

• 20%

• 50%

A car travels 300 miles in 5 hours. What is the constant of proportionality in the equation relating distance and time?

• 60

• 100

• 50

• 200