Question

What is the answer to y-4=-2/3(x-9)

Answer 1

You have an equation with to variables.
What question are you being asked?

y - 4 = -2/3(x - 9)

3y - 12 = -2x + 18

3y = -2x + 30

y = -2/3 x + 10 <------ slope-intercept form

Answer 2

y-4=-2(x-9)/3
y-4=(-2x+18)/3
Cross multiplication
3(y-4)=-2x+18
3y-12=-2x+18
3y=-2x+18+12
3y=-2x+30
y=-(2/3)+10