Question

A machine used to make badges costs $120. It costs $5 to make each badge. Write a function to show the total cost f(n) of making n badges. y=120+5x f(n)=(120+5)n f(n)=120n+5 f(n)=5n+120

Answer 1

First, I find it helpful to write the function myself.

There is a set fee of $120, and $5 per n badges.

120 + 5n

This is a basic model. Now we can see if any match.

f(n) = 5n + 120 matches. 

Let me know if you found any errors.