<PRE><B>Question 173563</B>
we have 2 points we will label then (P,C)  (1,50) and (2,25) so lets find the slope....change in C over change in P
:
25-50/2-1=-25 which is the slope of our equation...now lets the point slope formula ...I am going to use point (2,25)
:
C-25=-25(P-2)
:
C-25=-25P+50
:
{{{highlight(C=-25P+75)}}}
:
as you can see this can also be solved for P
:
divide all terms by -25
:
{{{-C/25=P-3}}}
:
{{{P=-C/25+3}}}
:
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