In this tutorial the instructor shows how to write a Slopeintercept equation that is perpendicular to a line and passes through a point. He shows how to do this by solving an example with sample values. He says that the slope of a line perpendicular to the original line is the negative inverse of the slope of original line. Now he writes down the slope value in the general equation y = mx + c, and by substituting the sample value in the equation he obtains the value of the Yintercept c, thus arriving at the equation of the final line. This video shows how to write an equation in slopeintercept from that passes through a given point and is perpendicular to the given line.
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