Question

Given triangle ABC with A(-3, 2), B(-1, -4), and C(4, 1), write the equation for the line containing altitude line AR in standard form.

A. x - y = 1
B. x + y = -1
C. x + y = 1
D. x - y = -1

I can't figure this out at all. It's been confusing me for a long time now. I really need help, it's my very last question and I have to get this done. Any help would be appreciated!

Answer 1

<b>LISTEN UP!</b>

You ask us about the line AR, but <u>you still haven't told us anything about point R!!!</U>

Where is it, in relation to ABC?

Answer 2

Sorry I yelled. I missed the word "altitude" in there.

I'll solve it in my next post.

Answer 3

The altitude AR is perpendicular to the line BC.

BC has slope 1, so AR has slope -1

The line through A(-3,2) with slope 1 is

y-2 = -(x+3)
x+y = -1

Answer 4

Steve is right! I asked my math tutor...