alg.

Find the slope of the line passing through the points (–2, 1) and (3, 9).

I know the equation to figure this out is:
m = y(2) + y(1)
-----------
x(2) + x(1)

but its a multiple choice question and my answer is not the same as the choices. how exactly do I set it all up? I have:
m = 9 + 1 10
------- = ---- = m=10
3 + (-2) 1

where am I going wrong??

<<where am I going wrong?? >>

It looks like you are trying to calculate the slope (m) of a line between x(1),y(1) and x(2), y(2). If so, you are using the wrong equation. The correct equation is
m = (y(2) - y(1))/ (x(2) - x(1))


ok, this makes perfect sense! now I am getting the correct answer, thanks!

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asked by lacy

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