anonymous
  • anonymous
When I plot these points, they are neither parallel or perpendicular. The slopes are WX (2) and YZ (-2). What am I doing wrong? Line WX contains (−1, 2) and (4, 12) Line YZ contains points (−5, 8) and (2, −6). Lines WX and YZ are perpendicular because the slopes are the same parallel because the product of the slopes is −1 perpendicular because the product of the slopes is −1 parallel because the slopes are the same
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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jdoe0001
  • jdoe0001
is not supposed to be the points per se, is supposed to be the lines they make :S
anonymous
  • anonymous
I know. Sorry, that's what I meant.
anonymous
  • anonymous
By plot, I meant I plotted and connected them to their respective lines. That's how I got the slope.

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jdoe0001
  • jdoe0001
ohh
anonymous
  • anonymous
The create two ~53degree angles and two ~126degree angles.
anonymous
  • anonymous
Which obviously is neither parallel or perpendicular.
jdoe0001
  • jdoe0001
well, you're correct, they don't, but that depends on your plotting "scale factor" for each axis, they won't if the scale of the y-axis and x-axis is one to one
jdoe0001
  • jdoe0001
for the graphing board that is
anonymous
  • anonymous
I don't understand.
jdoe0001
  • jdoe0001
lemme get the equatins and plot them, so I can show you
anonymous
  • anonymous
Oh, real quick, if is straight up and down, it's slope is undefined right? And horizontal is a slope of zero
jdoe0001
  • jdoe0001
yes
jdoe0001
  • jdoe0001
well, dohh, they're not supposed to be perpendicular :S
jdoe0001
  • jdoe0001
darn, my bad, I guess it skipped me for a sec
jdoe0001
  • jdoe0001
anyhow, perpendicular lines have NEGATIVE RECIPROCAL slopes what you have there are just negative version of the positive so x is increasing from left to right -x is decreasing from left to right
jdoe0001
  • jdoe0001
a perpendicular line to a slope of 2 line will be one with -1/2, negative reciprocal
jdoe0001
  • jdoe0001
so -2 is just the "decreasing" version of "2"
anonymous
  • anonymous
In order to make the line perpendicular, it would have to have a slope of -1/2 not -2.
anonymous
  • anonymous
Besides, none of the answers fit. The slopes are not the same. The sum of the slopes is 0.
anonymous
  • anonymous
Any ideas? @Lagoonabarbie
anonymous
  • anonymous
@ababylizard When I plot the points on paper, I got this..
1 Attachment
anonymous
  • anonymous
Showing they do intersect perpendicularly, and The slope is -2 for one, and 2 for the other
anonymous
  • anonymous
In order for lines to intersect perpendicularly, they need to be negative reciprocals of one another.
anonymous
  • anonymous
For 2, it has to be -1/2

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