glocurlsprinces
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  • 14-01-2019
  • Mathematics
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List m passes through the points ( -4,3) and (-4,7). What is the slope of the line that is perpendicular to line m ?

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jdoe0001 jdoe0001
  • 14-01-2019

Check the picture below.

notice, this line, in black, is really just a vertical line, namely x = -4.

a perpendicular line to that, like the red line there, will be a horizontal line y = [some number].

recall a vertical line always has an undefined slope, whilst a horizontal line always has a slope of 0.

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