Michael J. answered 04/27/15
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Effective High School STEM Tutor & CUNY Math Peer Leader
Use the slope formula is the distance in y-coordinates over the distance in x-coordinates.
Slope = (y2 - y1) / (x2 - x1)
= (-4 -0) / (0 - (-3))
= -4 / 3
The slope is -4/3.