posted by carly .
I have an equation of P=(170-3x)(x-25)
How do I determine the y-intercept
I know I can determine the x intercepts by setting x = to zero, so those are easy to find, but I'm not sure how to find the y-intercept.
you find the x-intercept by letting y equal to zero, and
you find the intercept by letting x equal to zero.
math - Reiny -
Yes, sorry, that's what I meant to say.
So I find the x intercepts by saying
170 - 3x = 0 and solving and
x - 25 = 0 and solving.
I found those to be
(25, 0) and (56.67, 0)
But if I set x equal to zero here, the x intercept will be (0,0)
I have the solution as (0, -4250) but I don't see how to get that
so if x = 0 , we have
P = (170-0)(0-25)
= - 4250
so the point is (0, -4250)
well, how about that?
Oh my --- so sorry!!!
Yes - thank you!! Please call it the Sunday blues.....