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Coord Geometry. From two points. . . . Plot two points A and B on an x-y plane. What is the distance between them?. What is the distance between them?. Work in pencil. Plot two points A and B on an x-y plane. What is the equation of the line joining them?. . Gradient = dy/dx = -3/9 or -1/3 and we can use point A.
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