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Using: y2-y1 over x2-x1 the slope is -1/14

Using: y = mx+c the equation is y = -1/14x-19/28 which can be expressed in the form of 2x+28y+19 = 0

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Q: What is the slope and equation of a straight line passing through points -2.5 -0.5 and 4.5 -1?
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