Which equation represents the line passing through the points (2, −2) and (−5, 12)?

2x − y = 2
2x + y = 2
x + 2y = 2
x − 2y = 2

Question

Which equation represents the line passing through the points (2, −2) and (−5, 12)?  

2x − y = 2
2x + y = 2
x + 2y = 2
x − 2y = 2

amorfide · Answer

anonymous · Answer

i tried it with the y2-y1 got a little frustrated

anonymous · Answer

figured id ask again

amorfide · Answer

what do you not understand? let me know so i can explain

anonymous · Answer

i got 14/-7 thats where im stuck

amorfide · Answer

that cancels down... to -2
so your gradient is -2 
do you agree?

anonymous · Answer

yes

amorfide · Answer

okay so now choose one set of coordinates

lets use
(2, −2)

y-y1=m(x-x1)

y1= y coordinate
x1=x coordinate
m=gradient

sub in your values

apoorvk · Answer

a line passing through two points (x',y') and (x'',y'') has the formula

$$\frac{y-y'}{x-x'} = \frac{y'-y''}{y'-y''}$$

amorfide · Answer

oh i assume im wrong? oops

anonymous · Answer

i giv up im just gonna guess :(