Question

The cost to mail a package is $8 for the first 4 pounds and 25 cents for each additional ounce. Which of the following functions represents the cost to mail a package if x is the number of ounces over 4 pounds?

f(x) = 0.25+ 8x
f(x) = 8 + 0.25x
f(x) = 32 + 0.25x
f(x) = 0.25(x + 4)

Answer 1

f(x) = 8 + 0.25x

Explanation:

It is given we are considering a package over 4 pounds.

Hence, the $8 will be a constant.

If the number of additional ounces is represented by x, and each ounce costs $0.25, then it is given by : 0.25x

Hence, the function which represents the situation given :

f(x) = 8 + 0.25x