A pharmaceutical salesperson receives a monthly salary of 00 plus a commission of 7% of sales. Write a linear equation for the salesperson’s monthly wage W in terms of monthly sales S. Let me see. I will let W(S) = monthly wage W in terms of monthly sales S. 00 plus a commission of 7% of sales = 5000 + 0.07S. We now put it all together: W(S) = 5000 + 0.07S You say?