Question 383794
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We know that parallel lines have equal slopes and perpendicular lines have slopes that are negative reciprocals.  Put both of your equations into slope intercept form.  Then by inspection of the coefficient on *[tex \Large x] in each equation determine the slope, *[tex \Large m_i], of the graph of each equation.


If *[tex \Large m_1\ =\ m_2] then the lines are parallel.


If *[tex \Large m_1\ =\ -\frac{1}{m_2}] where *[tex \Large m_1,\,m_2\ \neq\ 0], then the lines are perpendicular.  Or if one of the slopes is zero and the other is undefined, then the lines are also perpendicular.


Otherwise the lines are neither parallel nor perpendicular.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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