Math 8 Section 5.1

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

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

• x = 2y + 15

• y = 15x + 2

• x = 15y + 2

• y = 2x + 15

You are visiting Baltimore, MD and a taxi company charges you a flat fee of $3.00 for using the taxi and $0.75 per mile.

Which of the following equations matches the situation?

• y = 0.75x + 3

• y = 3x + 0.75

• y = 3x - 0.75

• y = 0.75x - 3

 In order to join an online learning community, there is a $20 startup fee and a $5 monthly fee. Write an equation in slope-intercept form that models this situation.

• y = 20x + 5
• y = 5x +20
• y = 20x - 5

• y = 5x - 20

Bob has $150 in his savings account and saves $40 per month.

• y = 150x - 40

• y = 40x + 150

• y = 150x + 40

• y = 40x - 150

Easy Car Rental charges $8.50 an hour plus a rental fee of $25.50. Which equation represents the total charges for x hours?

• y = 8.5x - 25.5

• y = 8.5x + 25.5

• y = 25.5x - 8.5

• y = 25.5x + 8.5

A holiday meal costs $12.50 a person plus a delivery fee of $30. Which equation represents the amount a holiday meal costs, including delivery, for x people?

• y = 12.5x + 30

• y = 12.5x - 30

• y = 30x + 12.5

• y = 30x - 12.5

Jerry has $20 and makes $7 per hour. Which equation represents the total amount of money Jerry has after working x hours?

• y = 7x + 20
• y = 20x + 7

• y = 20x - 7

• y = 7x - 20

Sonya has $40 in her lunch account and spends $2 each day to eat lunch. Which equation can be used to find the amount of money Sonya has left on her account after x days?

• y = 2x + 40

• y = - 2x + 40

• y = 40x + 2

• y = - 40x + 2

A man is climbing down from 100 feet high descending 30 feet per minute.

• y = - 30x + 100

• y = 30x + 100

• y = 100x + 30

• y = 100x - 30