Question

please help!

What is the equation of the line that passes through (-2, 2) and (1, -4)?

-y = 2x - 2
-y = -2x - 4
-y = -2x - 2
-y = 2x + 4

Answer 1

First find slope
Slope formula:\[\frac{ (y2-y1) }{ (x2-x1) }\]

Answer 2

thats the formula hahahaha correct :D

Answer 3

(-2,2) (1,-4)
x1,y1 x2,y2

Plug in the values and solve @ttop0816

Answer 4

@jacalneaila @uri thank you so much!

Answer 5

ok sorry uri

Answer 6

lol @uri go easy on her
And yes @ttop0816 that's just the slope... which is only the beginning :D

Answer 7

http://www.regentsprep.org/Regents/math/geometry/GCG1/EqLines.htm

Answer 8

this is the guide @ttop0816

Answer 9

The website doesn't load @jacalneaila ^_^

Answer 10

oh.... haha please explain the rest please!

Answer 11

Gladly @ttop0816
But first, please find the slope of the line. I think it was briefly mentioned...

Answer 12

ah really

Answer 13

?why? lol XD

Answer 14

Hey @uri please be nice :(

Answer 15

@uri okay i found the slope

Answer 16

@uri -2

Answer 17

@uri be calm

Answer 18

Brilliant :)
When you know the slope \(\large \color{blue}m\) of a line as well as a point \(\large (\color{red}a \ , \ \color{green}b)\) which the line passes through, then the equation of the line is given by
\[\Large y = \color{blue}m (x-\color{red}a)+\color{green}b\]

Answer 19

Savvy? XD

Answer 20

:D

Answer 21

@terenzreignz :D

Answer 22

^_^ may pagkataray si uri

Answer 23

can anyone tell me the answer or how to solve the question????

Answer 24

I am... you know the slope m = -2 right?
Now, what's a point that your line passes through... you're given two of them, we only need one, pick one ^_^

Answer 25

@terenzreignz would it be this one?? --->-y = 2x - 2

Answer 26

I don't know @ttop0816 let's find out.
Now, pick one of your points...

Answer 27

terence what formula is this....havent used it ever.

Answer 28

is this same as y-y1=m(x-x1)?

Answer 29

@terenzreignz @uri im sorry but could i just get the answer this one time please? im in a hurry right now;

Answer 30

@uri's decision...

Answer 31

First tell me..Is the formula right? @terenzreignz

Answer 32

Of course @uri
It comes from the point slope form
\[\Large y-b = m(x-a)\]or if you like
\[\Large y - y_0 = m(x-x_0)\]
I just brought the b-over to the right side.

Answer 33

Why did you write y0 it's y1

Answer 34

Doesn't really matter :)

Answer 35

but aren't you confusing this kid? Because at schoool we usually use y-y1=m(x-x1) @terenzreignz

Answer 36

Yes, we use that, but if you notice, it looks NOTHING like her choices.

Answer 37

I adapt to the one that will most easily be recognisable.

Answer 38

Oh..so help her out in this one..@terenzreignz

Answer 39

I'm willing.
But... work with me here @ttop0816
Come on, I'm just asking you (for now) to pick one of your two points...