Question

The function f(x) = 0.11x + 43 relates how much Derek pays for phone service, f(x), to the number of minutes, x, used for international calls in a month. What is the value and meaning of f(320)?

$78.20; this is the amount Derek pays for 320 months of service
$78.20; this is the amount Derek pays for 320 minutes of international calls
$92.50; this is the amount Derek pays for 320 months of service
$92.50; this is the amount Derek pays for 320 minutes of international calls
I think it is B , is that correct ?

Answer 1

Correct, great job! :)

Answer 2

thx :)