Construct a Function to Model Linear Relationship

Dominoes charges $6 per pizza. The delivery fee is $4. Write an equation to model this situation.

• y = -4x+6

• y = 6x+4

• y = 1/6x-4

• y = 64x

y= 80x + 125 models the amount of money (y) in the register after selling x tickets. How much money does she have in the register before selling any tickets?

• $125

• $80

• $205

• $45

A fitness club opens with 80 members. Each month the membership increases by 15 members. Which equation represents the relationship between the number of months the club has been opened, x, and the total fitness club membership, y?

• y=15x

• y=15x+80

• y=x+15

• y=80x+15

A pool is being filled at a constant rate. The amount of water in the pool is a function of the minutes it is being filled. What does y represent in this situation?

• time filling the pool

• the intial amount of water in the pool

• total amount of water in the pool

• how fast the pool is being filled

Find the initial value/distance. Hint: (0, y)

• 0 meters

• 2000 meters

• 2040 meters

• 2480 meters

Write an equation in y = mx + b form for the cost, y, to belong to the gym for x months.

• y = 35x + 40

• y = 40x + 35

• y = 35 x + 70

• y = 75x

The total cost, y, for a member to see 5 movies, x, is $40 and the total cost to see 12 movies is $75. Assume the relationship is linear. Find the rate of change (slope).

• $8 per movie

• $5 per movie

• $6.25 per movie

• There is no constant rate of change.

Write an equation in y = mx + b for the movie membership above.

• y = 15x + 5

• y = 5x + 15

• y = 5x + 40

• y = 12x + 75

What is the slope of this equation? 
y = 3x - 4 

• 3

• -4

• 3x

• 4

Write the equation for the table given

• y = 1/3x

• y = 3x

• y = 1/2x