Pre-calculus Question

Calculus
Tutor: None Selected Time limit: 1 Day

Show that the line through (2, 3) and (7, -7) is perpendicular to the line through (3, 3) and (-2, 2).

Aug 11th, 2015

Thank you for the opportunity to help you with your question!

If lines are perpendicular then the multiplication of their slopes = -1

line 1 slope = change in y/ change in x = (3--7)/2-7 = 10/-5 = -2

line 2 slope = 3-2/3--2=1/5

-2*1/5 = -2/5

The lines are therefore not perpendicular

Please let me know if you need any clarification. I'm always happy to answer your questions.
Aug 11th, 2015

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Aug 11th, 2015
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