Proportional Functions

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

• Proportional

• Non-proportional

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

• Proportional

• Non-proportional

The grocery store sells cantaloupes for $4.50 per pound. Write an equation to represent the cost, c, for the number of pounds of cantaloupes bought, p.

• c = 45p

• c = 4.5p

• p = 4.5c

• p = 45c

Which statement best describes this situation?

• Kevin earns $16.50 per hour.

• Kevin earns $8.00 per hour.

• Kevin earns $8.25 per hour.

• Kevin earns $8.50 per hour.

• y = 2x - 15

• y = 15x +2

• y = -15x

• y = 15x

Mr. W spends an extra 45 min in the school everyday. Click on the equation that shows how much extra time he spends in school based on the number of days, x.

• yx=45

• x=45y

• y=45x

• y+45x

The total cost (y) at an amusement park can be modeled by y=1.5x+20 where x is the number of rides you ride. What is the price to ride 10 rides?

• 35

• 21.5

• 30

• 30.50

An airplane 30,000 feet above the ground begins descending at the rate of 2000 feet per minute. Assume the plane continues at the same rate of descent. The plane’s height and minutes above the ground are related to each other. Find the altitude of the plane after 5 minutes.

• 2,000 feet

• 20,000 feet

• 10,000 feet

• 25,000 feet

Betty owes Maggie $50. Betty pays Maggie back $2 a day. Click on the equation showing the money that Betty still has to pay back.

• 50=2x

• y=2x-50

• y=50x-2

• 2=50x

The table of values shows a proportional relationship between x and y. What is the slope (m) of the line?

• 8/5

• 5/8

• 5

• 8