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TSI Math Videos 144 videos

TSI Math: Writing the Slope-Intercept Equation of a Graphed Line
97 Views

What is the equation of the line graphed above?

TSI Math: Plugging in Slope and Point to Find the Equation of a Line
12 Views

A line passes through the point (-4, -4) and has a slope of . What is its equation?

TSI Math: Using Intercepts to Find the Slope of a Line
5 Views

Line A has an x-intercept of -4 and a y-intercept of 8. What is its slope?

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TSI Math: Recognizing the Equation for a Bisector of a Graphed Line 4 Views


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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

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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