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Description:
Which of the following lines is perpendicular to the line graphed above?
Transcript
- 00:02
Okay yes i mash bumpers We've got a fancy graph
- 00:04
for you right here this thing all right which of
- 00:07
the following lines is perpendicular to the line Graft above
- 00:15
All right so this interesting gotta couple observations off the
- 00:17
bat here It's a negative slope right So it's ah
Full Transcript
- 00:20
lining down there So the slope of the one perpendicular
- 00:24
has to be the opposite And reciprocal Well perpendicular as
- 00:28
we said is a matter of slope We don't need
- 00:30
to graph the answer choices here Instead we just compare
- 00:33
the slopes visually like we're doing here It takes two
- 00:35
slopes to make a comparison and we need a single
- 00:38
slope before we can have two So find slope of
- 00:40
the given line starting at thehe y intercept zero Negative
- 00:43
three right there The line moves Five units the right
- 00:45
one unit down to reach five Negative four five right
- 00:49
and one down is equivalent to will rise Overrun that's
- 00:52
negative one over five or negative one fifth So that's
- 00:55
a slope of this line Since we're dealing with purpose
- 00:57
particular lines were looking for slopes that are negative Reciprocal
- 01:00
sze will the negative reciprocal of negative one fifty five
- 01:03
So we have to zoom in on an answer choice
- 01:05
with a slope of five Luckily the answers are all
- 01:07
written and slope intercept form y equals mx plus b
- 01:10
so that should be easy The coefficient of the ex
- 01:12
term am There is the slope in this form and
- 01:15
the only answer with an ex coefficient of five And
- 01:18
therefore a slope of five is y equals five x 00:01:22.212 --> [endTime] plus sixteen So well it is That's it
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