SOLUTION: Line D passes through the points (1,1) and (5,6). What is the slope of the line perpendicular to line D?

Question 822068: Line D passes through the points (1,1) and (5,6). What is the slope of the line perpendicular to line D?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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(1,1) (5,6)
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to solve the linear equation, copy and paste this (the two given points):
1,1,5,6
into the "Two-Point form: x1 y1 x2 y2" input box here: https://sooeet.com/math/linear-equation-solver.php
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x-intercept = (0.2, 0)
y-intercept = (0, -0.25)
slope = 1.25
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answer:
perpendicular lines have negative reciprocal slopes, so the slope of the perpendicular line is:
perpendicular slope = -1/1.25 = -0.8
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