Question

Find the equation of a line that passes through (5,-3) and is perpendicular to y = x.

a) y = x + 2
b) y = x - 8
c) y = -x + 2
d) y = -x - 8

Answer 1

We know the slope is -1, because perpendicular line's slopes are always the negative reciprocal. We plug (5, -3) in to get:
-3 = -5 + b
b = 2
So we get C. y = -x + 2.
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Hope this helps!
==jding713==