If I'm getting this right, your equation is:
y=-7x+12
This is the simple form, it'll give you all the information you need:
Slope= -7x
This is the rise of the line, the x representing the variable of slope
Intercept=12
The y intercept is where the line crosses at a (0,#) point. Its also the number that's being added to that slope, in this case its 12.
