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ACT Aspire Math: Using Intercepts to Find the Slope of a Parallel Line 0 Views


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Description:

A line has an x-intercept of -2 and a y-intercept of -4.

What would be the slope of a parallel line?


Transcript

00:01

Okay Shmoop math people We've got more drills for you

00:04

Here we go A line has an x intercept of

00:07

negative too In a way i intercepted negative for what

00:09

would be the slope of a parallel lines Well we

00:18

hear it Shmoop headquarters have very strong suspicion that in

00:21

a parallel universe there's a website called shin up Unfortunately

00:25

we'll never find out because well one thing being parallel

00:28

to another means that those two things we'll never meet

00:32

so heavy sigh We'd really like to know what's going

00:34

on It's new up headquarters Well we could imagine that

00:37

at least in the shin uppers minds over there well

00:40

they're basically doing the same thing as we are only

00:43

with one less hump in there in sadly for them

00:46

this makes all the difference for using slope intercept form

00:48

correctly Parallel lines likewise basically do the same thing They

00:52

have the same slope so their rise over run is

00:54

the same All we need to do then to solve

00:56

the problem is find the slope of the first line

01:00

right And then it's the same Second of course there's

01:02

minor detail actually finding that flow But what we got

01:05

you covered problem tells us that the line has an

01:07

x intercept of negative too which means that when y

01:10

zero the line is crossing the x axis that negative

01:13

too right there In other words we've been given one

01:15

of the points of the line negative to zero But

01:18

wait there's more The y intercept is negative For which

01:21

means that when x is zero the line is crossing

01:24

or intercepting the y axis at negative for well we've

01:28

got yet another point here is he wrote negative for

01:30

and with two points in our bag we can calculate

01:33

the slope using the fancy formula thing here Why two

01:36

months Why one over x to have money Sex one

01:38

Remember that thing So we got negative four minus zero

01:41

And then we have zero minus negative too which is

01:43

same as negative for over two Or just negative too

01:46

So the new line must have a slope of negative

01:49

too because that would be parallel to our line You

01:52

know in the land of shmoop is supposed to show

01:54

up You know what a copycat All right That's it

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