Model Linear Relationship

Ms. Deppe has $150 in her savings account and saves $40 per month. Which equation represents the amount of money (y) Ms. Deppe has in her account as a function of (x) number of months?

• y=150+40

• y=150x+40

• y=40x+150

At the beginning of the summer, Jenna had saved $141. She will earn $32 per day of summer work. Which of the following equations represents how much money she will have, in all, if she spends nothing all summer as a function of the number of days she worked?

• y = 141-32x

• y = x + 141

• y = 32x + 141

• y = 141x + 32

Kiki wants to rent a bounce house for her daughter's party. The cost, y, to rent the bounce house as a function of the number of hours, x, is shown in the table. The initial set up fee for the bounce house is which of the following?

• $65

• $55

• $130

• $185

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

• 4

• 10.75

• 11.75

• 12.75

• 12

• 13

• 14

• 18

Clare owns a mobile pet grooming company. She charges $20 to come to your home plus $30 per hour to groom your pet. Which equation models the amount she charges over time?

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