Writing Equations of Lines – Given Two Points

Writing Linear Equations Given Two Points

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Students learn to write the equation of a line given two points on the line, by first finding the slope of the line using the slope formula, m = (y2 – y1)/(x2 – x1), then substituting the slope and one of the given points into the point-slope formula, y – y1 = m(x – x1). Note that x-intercepts and y-intercepts are points. For example, an x-intercept of 2 is the point (2, 0) and a y-intercept of 2 is (0, 2).
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