Uh... this question is quite hard... i can’t solve it...!
OKAY fine whatever
100 - 75 = $25
This is a hyperbola check wiki for some guidance or plot it with wolfram alpha.
F(n)=9n
f(10)=9(10)
f(10)=90
f(10)=90 means that when you work 10 hours your gross pay is $90.