A sales person is paid a weekly salary of $760, plus a commission of 7.5%... Math Functions problem

Question

A sales person is paid a weekly salary of $760, plus a commission of 7.5% of all her sales for the week. Express her weekly income in terms of the weekly sales amount. Is this a function? How do you know? What is an appropriate domain?

Answer 1

let weekly sales = x

 

weekly income = 760+7.5% of x

 

                w(I) =760 +0.075 x

This is function.

As only one answer for w(I) for every x.