Pre-Calculus question? Parallel and Perp?

Find the value of k if the line joining (4,k) and (6,8) and the line joining (-1.4) and (0,8) are:

a. parallel
b. perpendicular

?

Please explain thoroughly! THANK YOU!

asked Aug 23, 2014 in PRECALCULUS by anonymous

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Pre-Calculus question? Parallel and Perp?

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