Question

6. Soda is on sale for $0.75 a can, and you have a coupon for $0.50 off your total purchase. Write

a function rule for the cost of n sodas. How much would 10 sodas cost?

C(n)=0.5n -0.75; $4.25
C(n) = 0.75n -0.5; $7.00
C(n) = 0.5n -0.5; $4.50
C(n) = 0.75n$7.50

Answer 1

`C(n)=0.75n-0.50;\ \$7.00`

Explanation:

Let

n-----> the number of sodas

C(n) -----> the total cost

we know that

The total cost is equal to the number of sodas multiplied by the cost of one soda minus $0.50 of the coupon

so

`C(n)=0.75n-0.50`

For n=10 sodas

substitute the value of n in the equation

`C(10)=0.75(10)-0.50`

`C(10)=\$7.00`