Finding an Equation of a Line Given the Slope and a Point
When the slope of a line and one point on it are known, the equation of the line can be determined using this four-step procedure: 1. Identify the slope . 2. Identify the point . 3. Substitute the slope and the coordinates of the point into the point-slope form: . 4. Simplify and rewrite the equation in slope-intercept form . This method works because the point-slope form is built from a known slope and any single point on the line, so plugging in the given information produces the unique equation of that line.
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