Finding (x,y)(x,y) of a line when given slope

Hey all, I need is to get the x,y x,y coords (which will draw my line) from a result that describes a line with slope/intercept form. Essentially, how can I convert my result of a slope/intercept answer into something flash can understand (I assume x,y x,y). This may be easy for some of you but I appreciate the help.

The formula I (think) I have a result for is:

[FONT=Times New Roman][SIZE=3][COLOR=#000000]*y = mx + b

What do I do with the number this gives me?

*Any other opinions on how I should approach perpendicular bisectors would be much appreciated.

I have solved the midpoint and the slope of my original line. Essentially I want to create another line as a perpendicular bisector over my original line.
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