help me with my TEST: LINEAR EQUATIONS & LINEAR SYSTEMS

Question

Mario sells electronics at Big Box Electronics Store. He is paid a salary of $200 a week plus 8% commission on his sales.

a) Write an equation for the line, in slope/y-intercept form, representing his weekly earnings, E, where S is his weekly sales. Put this answer into Blank #1.

b) Identify the slope. Put this answer into Blank #2.

c) What does the slope represent? Put this answer into Blank #3.

c) What does the E-intercept represent? Put this answer into Blank #4.

d) What were Mario’s sales in the week he earned $320? Put this answer into Blank #5.

Answer 1

E= 120 + 0.08S

slope = 0.08

slope = percent commission on sales

E intercept = his salary when he makes zero sales

320 = 120 + .08S

.08S = 200

S = 200/.08 = 50/.02 = 25/.01 = 250/.1 = $2,500 in sales for the week