Question 983535
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Use the slope formula:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ m\ =\ \frac{y_1\ -\ y_2}{x_1\ -\ x_2} ]


If the two lines are parallel, the two slopes must be equal, so set the two slopes equal to each other and solve for *[tex \Large k].


If the lines are perpendicular, their slopes are negative reciprocals.  Set one slope equal to the negative reciprocal of the other and solve for *[tex \Large k].


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

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \