You need to write the equation in the y-intercept form y = mx + b,
where m = slope and b = y-intercept.
x + 3y = 15
We want to isolate y.
Subtract x from both sides.
Doing so, we get this:
3y = -x + 15
We now divide both sides by 3 to isolate y.
y = (-1/3)x + 15
Final answer: m = (-1/3) and b = 15
Did you follow?
You can put this solution on YOUR website! x+3y=15
3y=-x+15
y=-x/3+15/3
y=-x/3+5
m=-1/3 & b=5 (graph 300x200 pixels, x from -6 to 20, y from -10 to 10, -x/3 +5).