If L is the line having x-intercept of -1 and y-intercept of 3, complete the equation of L.

I know that the y-intercept takes the place of b in y=mx +b. So, I have y=mx+3 so far. I'm just not sure where to substitute in my x-intercept.

Question

If L is the line having x-intercept of -1 and y-intercept of 3, complete the equation of L.

I know that the y-intercept takes the place of b in y=mx +b. So, I have y=mx+3 so far. I'm just not sure where to substitute in my x-intercept.

anonymous · Answer

Use Slope inter cept form

anonymous · Answer

x/a + y/b  = 1

anonymous · Answer

x/-1  + y/3  = 1

anonymous · Answer

-3x + y = 3

anonymous · Answer

Oh okay, I gotcha. Sorry it took me so long to reply, I was working it out :) Thanks!

anonymous · Answer

Welcome..)

anonymous · Answer

Wait. Actually. I think I did something wrong, I got y=3x-3

anonymous · Answer

x/-1 = -x

anonymous · Answer

Well this is what I did..
-3(x/-1 +y/-3)=1*-3
3x+y=-3
y=-3x-3
Oh crud. Well now I have two different answers..

anonymous · Answer

Oh wait, I just forgot the (-) sign the first time I wrote it, so I still got my same answer. It's just different from yours

anonymous · Answer

lol...+y/-3  hmmm..

it shuld be y/3

anonymous · Answer

Oh geeze... Whoops. Thanks :) Silly me!