Real World Linear

Your new job is at the Custom T Shop, where T Shirts are printed to order. For each order, Custom T Shop charges $8 per shirt plus a one time set up fee of $15, represented by the equation y = 8x + 15. How much would 50 shirts cost?

• $40

• $400

• $415

• $65

• $390

Which equation shows the number of bottles left, y, after x days? A family buys a case of water with 48 bottles and drinks 5 bottles per day.

• y = 48x + 5

• y = -5 + 48x

• y = -5x - 48

• y = 48 - 5x

Paul the plumber charges $25 for a service call. He then charges $100 an hour.  Write a linear equation to model this situation if x represents the number of hours Paul works.

• y = 100x

• y = 25x

• y = 25x + 100

• y = 100x + 25

A plumber charges $50 to make a house call. He also charges $25 per hour for labor. How much would it cost for 2.5 hours of labor?

• $100

• 4.50

• $112.50

• $65.00

• $123.45

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? The equation is y=0.20x+15. What does the y mean?

• amount of minutes

• total cost

• cost per minute

• variable

• flat fee

Joe’s Canoes charges an initial fee of $20 plus $4 an hour. Callie’s Canoes charges a flat rate of $14 an hour. Find the number of hours for which the total amount that both places charge would be the same.

• 3 hours

• 4 hours

• 1 hour

• 2 hours

The cost, c, to park in a parking garage can be represented using the equation c = 5 + 0.5h, where h is the number of hours the car is in the parking garage. Which of these statements is TRUE?

• It costs $0.50 to park in the garage for 1 hour.

• It costs $5 to park in the garage for 1 hour.

• It costs $5 per hour to park in the garage.

• It costs $6 to park in the garage for 2 hours.

Each month Chuck’s phone company charges a flat fee of $12 plus $0.05 per minute. Louie’s phone company charges him a flat fee of $6 plus $.85 per minute. How many minutes would the boys have to talk for their phone bill to be the same?

• 7 minutes

• 7 minutes and 30 seconds

• 8 minutes

• 8 minutes and 30 seconds

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 160 lbs and each box of books weighs 50 lbs. The maximum capacity of the elevator is 1000 lbs. How many boxes of books can the delivery person bring up at one time?

• 50x + 160 = 1000

• 50 + 160x = 1000

• 50x - 160 = 1000

• 50 - 160x = 1000

• $9

• $15

• $24

• $39