For the points a and b, you are given the x value of a point on the graph. This means all you have to do is plug in -3 into the equation, and 5 into the equation This gives -4.3(-3) and -4.3(5) The points end up being (-3,12.9) and (5,-21.5), final answer
The y-coordinate for Point A is 12.9 and for Point B it is -21.5, resulting in the points (-3, 12.9) and (5, -21.5).
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