To print t-shirts, there is a $100 set-up fee, plus a $12 charge per t-shirt. Let x represent the number of t-shirts printed and ƒ(x) represent the total charge.

(a) Write a linear function that models this situation.

(b) Find ƒ1(125). Interpret the answer in the context of this problem.

(c) Find the value of x if ƒ(x) = 1000. Express this situation using function notation, and interpret it in the context of this problem.