Question

I NEEED HELP GRAPHING!!!!!!!!

Answer 1

there is a graph and it says:

y= 3x + 4
y = 3x - 4

Answer 2

Where are we with this? Are we to use "Slope-Intercept"?

Answer 3

point slope form i guess idk

Answer 4

Both are in Slope-Intercept form. The top is (0,4), the bottom is (0,-4). Do you see that?

Answer 5

nope..

Answer 6

how did u get 0

Answer 7

hello?

Answer 8

y-intercepts are ALWAYS on the y-axis. The x-value is ALWAYS "0". The "form" is y = mx + b. That 'b' is the y-coordinate of the intercept.

Answer 9

cna you tell me in steps how to solve this

Answer 10

for example;

y= -1/4x
y= -1/4x + 8

Answer 11

The first "step" is to recognize the form and utilize the information it provides. y = -(1/4)x

1) y-intercept (0,0)
2) Slope -1/4

Done!

y = -(1/4)x + 8

1) y-intercept (0,8)
2) Slope -1/4

Done!

You ahve to learn how to read them. It's not magic.

Answer 12

oh.. so x = 0

Answer 13

can i do one now and u can check it for me?

Answer 14

y = 2x +1
y = -1/2x + 1

so its:
(0,1)
(0,-1)

Answer 15

or its (0,-4) not (0,-1)

Answer 16

y = 2x + 1

1) y-intercept (0,1)
2) Slope 2

y = -(1/2)x + 1

1) y-intercept (0,1)
2) Slope -1/2

It's like learning a foreign language. Don't expect it JUST to make sense to you. You have to organize it in your brain. It will get more natural with practice.

Answer 17

so i graph 2 pts on one

Answer 18

so after i found like (0,4) and (0,-4) do i just graph it or need to do more

Answer 19

Where did you get (0,4)? I don't see that, anywhere.

Answer 20

in the very first problem

Answer 21

Ah! I got tired of scrolling, sorry.

Yes, First one (0,4) and second one (0,-4). That is one point each for the two lines that are needed. NOW, we need to figure out what SLOPE means. Are you ready?

Answer 22

yes i am

Answer 23

You hae to get this concept in your head. That slope is a fraction, 1/4, 3/8, 4 = 4/1, -1/3, -5 = -5/1. Every "slope" can be expressed like this. How are we doing?

Answer 24

good

Answer 25

That fraction contains tons of information. We often hear it called "rise over run" or more technically "change in y over change in x"

Thus,

1/2 means change 1 in the y direction for every change of 2 in the x direction.

Positive is assumed to be up and right. Negative means down or left.

-1/3 means change -1 (down) for every change of 3 in the x direction.

3 = 3/1 means change 3 (up) in the y direction for every change of 1 in the x direction.

With this information, if you have one point to start (the intercept, for example), you can define the entire line.

Answer 26

so how would i graph

y = 3x +4
y = 3x -4

Answer 27

y = 3x+4

1) y-intercept (0,4) -- There is one point.
2) Slope 3 = 3/1 Move +1 in the x-direction and +3 in the y-direction. This shoudl leave you at (0+1,4+3) = (1,7)

Connect the dots. Extend the line segment. Add arrows. Amke it look pretty and you are done.

You do the other one.

Answer 28

ok hold on

Answer 29

can u draw a line and show me?

Answer 30

I have to work on my drawing skills. Do you see it or do I need to make a better effort?