Posted by trixie on .
Sales clerk at an appliance store have a chance of 2 payment:
Plan A: $580 every 2 weeks plus 4.2 % commission on all sales
Plan B: $880 every 2 weeks plus 1.2 % commission on all sales
a) Write a linear system to model this situation
b) Graph the linear system in part a
c) Use the graph to solve this problem: What must the sales for a 2week period be for a clerk to receive the same salary with both plans?

math 
Reiny,
incomeA = 580 + .042x , where x is total sales
incomeB = 880 + .012x
to sketch it, you obviously have to scale the xaxis and the income axis