Representing Function Relationships

Write an equation for this relationship.

• y=10.99x

• y=22.98x

• y=22x

• y=21.98x

Write an equation to represent the graph.

• y = 5x

• y = 10x

• y = 1/5x

• y = -5x

Which statement matches the graph?

• 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

Which of the following equations represents the total cost, C, for the number of sandwiches, S, where each sandwich costs $7?

• S = 7c

• C = 7s

• S = 7/c

• C = s/7

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage.  If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)?

• C = 15 + 0.20x

• C =15 (0.20x)

• C = 15 + x + 0.20

• C = 0.20 + 15x

Speedy Boat Rental charges a $15 deposit fee plus $2 for each hour of use to rent a paddle boat.  Write an equation for C, the total cost, to rent the boat for h hours.

• h = 2C + 15

• C = 15h + 2

• h = 15C + 2

• C = 2h + 15

The table shows a relationship for number of cars to trucks.  How many trucks should there be if there are 12 cars?

• 3

• 12

• 36

• 48

What is the missing value for x?

• 21

• 27

• 30

• 45

The table shows a relationship for number of cars to trucks.  How many cars are there for 3 trucks?

• 1

• 3

• 9

• 12

The table shows a relationship for number of cars to trucks.  If there are 15 trucks, how many cars should there be?

• 3

• 5

• 15

• 45