Question

Candy is on sale for $0.75 each. you have a coupon for $0.25 off your total purchase. Write a function rule for the cost of n pieces of candy.

A. C(n)0.25n-0.75
B. C(n)=0.75n-0.25
C. C(n)=1.0n
D. C(n)=0.75n

Answer 1

Required function rule is C(n) = 0.75n - 0.25

Answer 2

B. C(n)=0.75n-0.25

Explanation:

Given : Cost of one candy = $0.75

There is a coupon of $0.25 off on total purchase .

To Find : Write a function rule for the cost of n pieces of candy.

Solution :

Since we are given that total candies bought = n

Cost of one candy = $0.75

Cost of n candy = $0.75n

So, cost of total purchase = $0.75n

Since on total purchase there is a off of $0.25

So, cost of total purchase after off will be $0.75n -$0.25

⇒C(n)= 0.75n-0.25

Where C(n) denotes the total cost after getting off

Hence Option B is correct.

A function rule for the cost of n pieces of candy is C(n)= 0.75n-0.25