Question 319062
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Put each of the equations into slope-intercept form, that is into *[tex \Large y\ =\ mx\ +\ b] form.


If the slopes are equal, then the lines are parallel.


If the slopes are negative reciprocals, that is if *[tex \Large \ m_1\ =\ -\frac{1}{m_2}], then the lines are perpendicular.


If neither relationship holds, the lines are neither parallel or perpendicular.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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