tut 3.1 solving linear systems by graphing Example #2

sales clerks at a computer store have a choice of 2 methods of pay.
plan A= 5%of commission
plan B= weekly salary of $200 plus 2% of commission sales
Explain which is better and why
Solution
plan A is 5% so y=0.05x
plan B is 200 dollars plus 2% so y=200+0.02x
each equation equals a linear function so type each one into the y= function
then adjust your window settings to the best fit of the graph
press window function
x min=0
x max=9400
x scl=100
y min=0
y max=600
y scl=1oo
x res=1

so the 5% of commission is at a faster rate so it would be the better choice
to find the break even point you click 2nd function trace 5 or intersect
set first curve to the left then second curve to the right and guess then enter
the break even point (or intersection) is x=6666.66 Y=333.33

new assignment pg 121 #4, 5, 7, 9