Writing Equations and Graphing Function Rules(4.4-4.5)

A pizzeria charges $12 per pizza plus an additional $3 for delivery. Which equation represents the cost of having any number of pizzas delivered?

• c = 12p + 3
• c = 12p
• c = 3p
• c = 12 + 3p

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

A plumber charges a service fee of $40 plus $25 per hour for labor.
(A) Write a function rule for the total cost of hiring the plumber for a job that takes x hours.
(B) How much would it cost to hire the plumber for a job that takes 4 hours?

• (A) y = 40 + 25x
  (B) $140
• (A) y = 40x + 25
  (B) $185
• (A) y = 40 + 25x 
  (B) $185
• (A) y = 40x + 25 
  (B) $140

Tags

CCSS.HSF-BF.A.1A

The school cafeteria has 285 cartons of milk in stock. Each day, a total of 60 cartons are sold. Which function rule best represents this situation?

• y = 285x + 60 
• y = 285x - 60
• y = 285 - 60x
• y = 285 + 60x

Tags

CCSS.HSF-BF.A.1A

A water tank holds 84 gallons. When it began to leak it lost 3 gallons every hour. Write an equation to find the amount of water "y" the tank will have after "x" number of hours.

• y = 84 - 3x
• y = 3 - 84x

Tags

CCSS.6.EE.C.9

Identify the function rule that best represents the following statement:
A soda machine sells drinks for 75 cents each. Let d represent the number of drinks bought and C represent the total cost.

• d = $0.75C
• d = $0.75 + C
• C = $0.75 + d
• C = $0.75d

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

Identify the function rule that best represents the following statement:
The total cost (C) for kilograms of beef (k) if each kilogram costs ​$2.55

• C = 2.55k
• C = 2.55 + k
• C = 2.55 - k
• C = 2.55k + 2.55

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

Identify the function rule that best represents the following statement:
The base price (P) of a pizza is $4.99 plus an additional $0.95 for each topping (t).

• P = 4.99 - 0.95t
• P = 4.99 + 0.95t
• P = 5.94t
• t = 4.99P + 0.95

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

A car rental agency charges ​$28 per day to rent a car. They charge an additional $8 per day if the car comes installed with GPS. Which function rule best represents the total rental cost of a car with GPS installed for x days?

• y = 36x
• y = 28 + 8x
• y = 28x + 8
• y = 28 - 8x

Tags

CCSS.HSF-BF.A.1A

Cameron and Jess receive a certain amount of allowance every week. Jess gets $5 more than Cameron. Which function rule best represents this situation?

• J = 5C
• 5 = C + J
• C = 5 + J
• J = 5 + C

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

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

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4