Is The Line Through Points P(10, -9) and Q(12, -15) Perpendicular to The Line Through Points R(-8, 9) and S (-14, 17)? Explain.

Question

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Answer 1

PQ's slope is -6/2 = -3

RS's slope is 8/-6 = -4/3

to be perpendicutlar they have to have negative inverse slopes, opposite signs and inverses. They aren't

so they aren't perpendicular

slope = "rise over run" or the change in height divided by the change horizontally. The change in y over the change in x.

had the RS slope been +1/3, they would have been perpendicular