Question

Functions and slope

Answer 1

Graph the linear function: y=1/3x-4

Answer 2

@vzfreakz XD

Answer 3

Cam you say what is the y intercept?

Answer 4

No... Well, I'm not sure how to find it- or what it is

Answer 5

http://www.mathsisfun.com/equation_of_line.html

Answer 6

Did he answer your question?

Answer 7

Well, it helped, but not fully.

Answer 8

I suppose you understand what is y intercept now.

Answer 9

XD I'll give it a try.

Answer 10

Good :)

Answer 11

Whoa a mod! Nice to meet you Mr.Mod!

Answer 12

:P hahaha. He's the awesomest! C:

Answer 13

"y-intercept. Graph y=ƒ(x) with the x-axis as the horizontal axis and the y-axis as the vertical axis. The y-intercept of ƒ(x) is indicated by the red dot at (x=0, y=1)"

Answer 14

Nice to meet you too :)

Answer 15

Sorry but this is irrelevant.. How did you become a moderator here?

Answer 16

The admins select you if you are found mature enough with a good conduct. Okay let's get back to helping!

Answer 17

Haha I can see why they chose you!

https://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/slope-and-intercepts/v/slope-of-a-line

Answer 18

:P lol. Hey I think I'm kinda understandin'. XD

Answer 19

Thats a video explaining slopes and the y intercept stuff

Answer 20

oh thanks @Gator153760 :) much appreciated.

Answer 21

Dang he is cool haha

Answer 22

lol ikr :} lol

Answer 23

Here is a video by the same guy

https://www.khanacademy.org/math/algebra/algebra-functions/relationships_functions/v/what-is-a-function

Answer 24

You should be good to go! And they have more videos on the side bar

Answer 25

Good luck!

Answer 26

:D Thanks for helpin'! :D

Answer 27

Oh, and is the answer B?

Answer 28

Just to add:

There is a good method to approach graph problems like this.
If equation is y=mx+b

Put x=0 and solve for y. The value of y gives u y intercept(ie the location on y axis where the line cuts it)

y=mx+b

Put x=0

y=b

So (0,b) is the y intercept.

To find x intercept we can follow a similar method.
Put y=0 and solve for x.

y=mx+b
0=mx+b
-b=mx
x=-b/m

Then x intercept(point where line cuts x axis is (-b/m,0)

Mark these points and join them. You get the required line.

Answer 29

Thanks @AravindG . Everything really helps me understand. :D Just to check, is the answer B?

Answer 30

Just tell me this. What did u get as y intercept and x intercept?

Answer 31

Let me get my board again XD

Answer 32

Okay :)

Answer 33

The y intercept is b=-4

Answer 34

Good :) x intercept?

Answer 35

1/3? or is that something else XD

Answer 36

:) Getting a hang of it

Answer 37

Check my working above:

x=-b/m

Answer 38

Your b is -4 and m is 1/3

Answer 39

Wait its -5

Answer 40

Oooh! I must have been talking about the slope XD I'm mixed up sometimes.

Answer 41

-5? O.O

Answer 42

But wait, how did you get -5? XDD

Answer 43

@DJ♬Øϟϟ¥ so what did u get for x intercept?

Answer 44

y = -1/3(3) - 4
y = -1 - 4
y = -5

Answer 45

@Gator153760 You have to substitute 0 not 3!!

Answer 46

3,-3?

Answer 47

Ahh crap

Answer 48

Ignore what I said

Answer 49

Remember when we want to find x or y intercept we put the other variable ALWAYS to 0.

Answer 50

@DJ♬Øϟϟ¥ I am waiting...

Answer 51

Sorry, I don't know DX

Answer 52

I was thinkin' it was B bcuz the line goes through the y intercept. I thought that was good enough.

Answer 53

It is isnt that hard.

\[x=\dfrac{-b}{m}\]
\[x=\dfrac{-(-4)}{\dfrac{1}{3}}\]
\[x=4 \times 3=12\]

Answer 54

That isnt enough because option c also passes through y=-4

Answer 55

oh (つд｀) duh. Ok I'm gonna try to do the next one of these.

Answer 56

Good :)