Answer:
Step-by-step explanation:
399*42%= 167.58 the mark up amount
399+167.50=566.50 total
4.50 divides by 5 than times the answer by 7
65
y = -1/2x +11/2
slope finding: -5+6/1-3 = -1/2
equation making: y+5 = -1/2(x-1)
rearranging: y = -1/2x +11/2
See the attachments for the answer :)
