Question 76926
THE LINEAR LINE FORMULA IS: 
Y=mX+b WHERE m=SLOPE & b=Y INTERCEPT. 
YOUR PROBLEM IS NOT A LINEAR FORMULA BECAUSE IT HAS A COMPLEX TERM
Y=(12-X)/2X, 2XY=12-X (2XY) BEING THE COMPLEX FACTOR NOT A LINEAR TERM.
FOR NON-LINEAR GRAPHS THERE IS NO SLOPE DEFINED, & IN THIS CASE THERE IS NO Y INTERCEPT. (NO b VALUE)
Y=(12-X)/2X 
{{{ graph( 300, 200, -6, 5, -10, 10, y = (12-x)/2x) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = (12-x)/2x). 
HOPE THIS HELPS.