It is not possible to have an 
-intercept = -1, nor is 
-intercept = -2 possible either.
Intercepts are points, and points, in 
, are designated by ordered pairs.
Now, if the -intercept is the point )
and the -intercept is the point )
, the slope can be determined using the slope formula:
where )
and are two given points on the line in question.
I would hope that the designation of the -intercept would be obvious.
