Answer:
y=75x+50
y=600
x=3
Step-by-step explanation:
since at x=zero the y=50
then let y=nx+50
since at x=2 y=200, 200=2n+50, 2n=150, n=75
then y=75x+50
at x=8
y=75×8+50=600+50=600
at y=275
then 75x+50=275, 75x=225, x=225/75=3
