Question 458680
y=mx+b
2=-2m+b
b=2+2m
1=5m+b
b=1+5m
2+2m=1+5m
1=3m
m=1/3
2=-2*(1/3)+b
2=-2/3+b
2 2/3=b
check
b=1+5/3
b=2 2/3
ok
y=mx+b
y=x/3+8/3
3y=x+8
x-3y=-8