math rate of change

The points
(-1,2) and (4,y) have a slope of -4/5. What is the y- coordinate of the point (4,y)?

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  1. slope is rise over run which is
    (y2-y1)/x2-x1) so to get y we have
    y-2=-4so y =-4+2 which is -2.

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  2. Does rate of change means line or slope?

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