Question

Hi everyone,

since two days I'm following the lesson 18.01SC and I don't really understand this:

In Session 2, Clip 2 he explaines that to get the x-intercept of the triangle you have to use this formula:

y - y0 = m (x - x0)
with:
y = 0, because it is an intercept with the x-axes.
y0 = 1/x0
m = -1/x0^2
x = x
x0 = x0

But I don't get why it is y - y0 and not just y0 and why it is m (x - x0)...

Could someone please help me with this? If it is a bit of a stupid question, I'm sorry.

Answer 1

Hi, thanks for you question, I think I understand it now... If I find an other problem that I can't figure out, I'll be back here.

Thanks you so much!