Question 788738
That equation does not look right.  What is the "*F"?  What are you trying to say?  


A good relationship between Fahrenheit and Celsius can be made using the points, (F,C) for the freezing and boiling points of water.  These are (32,0) and (212,100).  


Slope is{{{m=100/(212-32)=100/180=highlight(1/1.8)}}}


From slope-intercept for for the equation of a line, {{{y=mx+b}}}, you can get formula for b, the y-intercept, as {{{b=y-mx}}}.  Pick either of the known points for this line, nomatter which, and compute b.


Picking (212, 100), {{{b=100-(1/1.8)212=highlight(-17.8)}}}


This then gives the equation {{{C=(1/1.8)F-17.8}}}, which you might want rearranged.
{{{C(1.8)=1.8((1/1.8)F-17.8)}}}
{{{1.8C=F-(1.8)*(17.8)}}}
{{{highlight(1.8C=F-32)}}}
Which can be written as a formula for degrees F,
{{{highlight(F=1.8C+32)}}}