Solve the equation for , which is to say get all by itself in the LHS and everything else in the RHS. Once you do that correctly, the coefficient on will be the slope.
John
My calculator said it, I believe it, that settles it
You can put this solution on YOUR website! Find the slope: x + 3y = -9
3y = -9 - x
Divide each item by 3
3y/3 = -9/3 - x/3
y = -3 - x/3
Drawing the graph the x and y values are:
(-6,-1)
(-3,-2)
(0,-3)
(3,-4)
(6,-5)
The slope = rise/run = -2/6 = -1/3
The other method to find the slope is:
(y2 - y1)/(x2 - x1)
(-4 - (-3))/(3 - 0)
-4 + 3 = -1
3 - 0 = 3
= -1/3
The Slope: -1/3
