Interpreting Functions Word Problems

According to the graph, at what speed is this car traveling in miles per hour?

• 80 mph

• 20 mph

• 40 mph

• 160 mph

Tim bought a new phone. He paid $125 on the day of purchase, then $50 per month until it was paid off. What linear equation models this situation?

• y = 50x - 135

• y = 50x + 125

• y = 125 + 50

• y = 50x

What is the rate of change demonstrated in this graph?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

Which statement is true about this function?

• The function is never constant

• The function is always increasing

• The function is never decreasing

• The function increases at the same rate between the interval x=11:00 and x=13:00

Over which interval of time is this person returning home?

• A

• B

• C

• D

• E

List the types of intervals that the graph demonstrates in order.

• decreasing, constant, increasing, constant

• increasing, decreasing, constant

• increasing, constant, increasing, constant

• increasing, constant, decreasing, constant

How long did it take Sam to get to school?

• 5 minutes

• 20 minutes

• 1.25 km

• 1.25 minutes

What does the point (2005, 14500) represent?

• In 2005, her car was worth $14,500.

• Her car was worth $2,005.

• She bought the car for $14,500.

• Her car lost $2,005 in value from $14,500.

A pizza parlor calculates the cost of a pizza using the equation C = 0.75t+10 where C is the cost and t is the number of toppings. Tina only has $12. How many toppings can she get?

• 2 toppings

• 1 topping

• 4 toppings

• 3 toppings

Izzy works at a shoe store where she makes $40 per shift plus $10 for each pair of shoes she sells. T is Izzy's total income, and x is the number of pairs she sells. If Izzy sells 3 pairs of shoes, what will her income be? 

• $70

• $50

• $120

• $130