Review #5 Linear Equations

Bob has $150 in his savings account and saves $40 per month. Which equation would be used to find the amount of money in the savings account after x months?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

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 = 15C + 2

• C = 15h + 2

• C = 2h + 15

 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

The function y = 1.90 + 1.40x shows the cost of a hot dog with different numbers of toppings (x). What is the rate in the context of this situation represent?

• The cost will increase by $1.40 per topping

• The cost will decrease by $1.40 per topping

• The cost will increase by $1.90 per topping

• The cost will decrease by $1.90 per topping

A T-shirt design company charges your team an initial fee of $25 to create the team's design. Each t-shirt printed with your design costs an additional $8. The equation for this situation is y = 8x + 25. Interpret the y-intercept in context.

• The additional fee of $8.

• The initial fee of $25.

• The additional fee of $25.

• The initial fee of $8.

Which situation below is representative of a y-intercept?

• putting $300 a month into savings

• buying $30 worth of supplies for a lemonade stand

• Spending $3 per ride at the fair

• Paying $2 for parking every day

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 = 12.5 + 30

• y = 12.5 + 30x

Sonya has $40 in her lunch account and pays $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 = 40 + 2x
• y = 40 - 2x
• y = 2 + 40x
• y = 2 - 40x

Sandra has a $20 itunes gift card and spends $3 each month.  Which equation can be used to find how much money Sandra has on her giftcard after x months?

• y = 3x + 20
• y = 3 + 20x
• y = -3x + 20
• y = -20x + 3

The balance of Amber's savings account is shown in the graph. Which equation models this scenario?

• y = 350 - 50x

• y = 50x + 350

• y = 350x + 50