Rule:  

The equation 



has slope  and 

y-intercept the point 

Therefore to use that rule, your equation



must first be gotten into the form

 

Let's do that:



Clear of fractions by multiplying every term by 





Add -40 to both sides



Get rid of the negative sign in front of y by changing
the sign of every term on both sides:



Compare that to



and we see that it

has slope  and 

y-intercept the point 

Edwin