Hi there!
So for the slope, you use the equation:
M = y2-y1 / x2- X1
So basically, pick any of the x values to be x1 and x2, and pick any y value to be y1 and y2. It doesn't matter.
m = -2-4 / 3- (-2)
m = -2-4 / 3+2
m = -6/5
I hope this helped! :)
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