<PRE><B>Question 647909</B>
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The line *[tex \LARGE x\ =\ 9] has an undefined slope.  Hence, any perpendicular to such a line must have a zero slope (horizontal).  Lines with a zero slope have the characteristic that all points on the line have identical *[tex \LARGE y] coordinates.  Just set *[tex \LARGE y] equal to that value.  In the case of horizontal lines the slope-intercept and standard forms are identical.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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