91Ó°ÊÓ

MAKE A DECISION: CHOOSING A JOB As a salesperson, you receive a monthly salary of \(\$ 2000,\) plus a commission of \(7 \%\) of sales. You are offered a new job at \(\$ 2300\) per month, plus a commission of \(5 \%\) of sales. (a) Write a linear equation for your current monthly wage \(W\) in terms of your monthly sales \(S\). (b) Write a linear equation for the monthly wage \(W\) of your job offer in terms of the monthly sales \(S\). (c) Use a graphing utility to graph both equations in the same viewing window. Find the point of intersection. What does it signify? (d) You think you can sell \(\$ 20,000\) worth of a product per month. Should you change jobs? Explain.

Use a graphing utility to graph the cost equation. Determine the maximum production use a graphing utility to graph the level \(x\), given that the cost \(C\) cannot exceed \(\$ 100,000\). $$ C=75,500+89 x $$