3.3 Modeling with Functions

3.3 Modeling with Functions

by Perla Galindo

Multiple Choice

Georgia, a florist, charges $10.95 per flower bundle plus a $15 delivery charge per order. What is the equation for this scenario written as a function of x?

• C(b) = 15b + 10.95

• C(b) = 10.95+15

• C(b)= 10.95b+15

• C(b)= 10.95b-15

Multiple Choice

Georgia, a florist, charges $10.95 per flower bundle plus a $15 delivery charge per order.

C(b) = 10.95b+15

If Charlie orders 8 bundles of flowers and has them delivered, how much does Georgia charge Charlie?

• $87.60

• $130.95

• $102.60

Multiple Choice

The cost of renting a DVD is $1.50 per day (𝑑). Which function represents the cost of renting the DVD?

• A. 𝑓(𝑑) = 1.50 + 𝑑

• B. 𝑓(𝑑) =  $$\frac{1.50}{d}$$  

• 𝑓(𝑑) = 1.50d

• 𝑓(𝑑) =  $$\frac{d}{1.50}$$  

Multiple Choice

Mary has already sold $55 worth of tickets to the benefit concert. She has 3 tickets left to sell at $7 per ticket.

What does the equation look like in function notation, f(t)? 

• f(t)=55t+7

• f(t)=7t + 55

• f(t)=3t+55

Multiple Choice

Function 𝑤 gives the weight of a cat, in kilograms, when it is 𝑚 months old. Which statement represents the meaning of the equation 𝑤(7) = 4 in this situation?

• A. The cat weighs 7 kilograms when it is 4 months old.

• B. The cat weighs 4 kilograms when it is 7 months old.

• C. The weight of the cat has been 7 kilograms for 4 months.

• D. The cat weighs 4 kilograms when it is 7 years old.

Multiple Choice

Function 𝐶 gives the cost, in dollars, of buying 𝑛 apples. Which statement best represents the meaning of 𝐶(10) = 9?

• A. The cost of buying 9 apples

• B. The cost of 9 apples is $10.

• C. The cost of 10 apples

• D. Ten apples cost $9.