Algebra 2 Special Functions Please Help

OPEN ENDED Write a function involving absolute value for which f(2) = 3.
Writing in Math Use the information on page 115 to explain how step function’s apply to
postage rates. Explain why a step function is the best model for this situation while your gas
mileage as a function of time as you drive to the post office cannot be modeled with a step
function. Then graph the function that represents the cost of a firstclass letter.

You are required to make your own graph, do not use links.