Answer:
a. y = (3/5)× x +1
Step-by-step explanation:
y= mx+c
m = (13-4)/(20-5) = 9/15 = 3/5
c= 1
so, y= mx+c becomes y= (3/5) × x +1
p(80+60)=560
p(140)=560
560/140 = 4 hours
D
13%
Commission rate = commission / value sold
= 286/2200
= 13%