Slope = 2/3
y = mx + b
6 = 2/3(3) + b so b = 4
equation
y = 2/3x + 4
3y = 2x + 12
answer is c.3y = 2x + 12
You solve this by plugging one equation into the other. Usually you have to rewrite one equation to make this work. In this case I choose to rewrite y-4x=0 as y=4x.
After plugging it into the second, you get:
3x + 6*4x = 9 => 27x = 9 => x=1/3
Putting this solution back into y=4x gives us y=4/3
