1. The cost (in dollars) per unit of making x photocopies at The Office Shop is given 18 cents for at most 20 copies
► 12 cents for more than 20 copies up to 50
9 cents for more than 50 copies but less than 100
5 cents for 100 copies or more but up to 200
> 3 cents for more than 200 copies
Part A: Write the piecewise-defined function that represents the situation.
Part B: Represent the function on the graph below.
Part C: Explained why it would not be cost-effective to make 150 photocopies.