Answer:
y = -1x + 2
Step-by-step explanation:
y = -1x + b
5 = -1(-3) + b
5 = 3 + b
2 = b
1372$
the price =15600+20/100*15600=15600*120/100=18720
18720-5000=13720 $
13720:10=1372 $
