Posted by **Mike** on Sunday, January 7, 2007 at 11:15pm.

Write an equation in slope-intercept form for a line that passes through the given point and is perpendicular to the given line.

1. y=3;(4,-2)

The y = 3 line is parallel to the x axis so the perpendicular line you want is parallel to the y axis. That means x must be a constant in the equation for that line. Since it goes through the point (x = 4, y = -2), the equation is x = 4. (y can be anything, including -2)

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