"K " <email@example.com> wrote in message news:firstname.lastname@example.org... > Hello, > > I have two points (a,b) that make up a line, and a third point (c). I'd > like to draw a line (length x) that is parallel to (a,b) but passes > through c (at its midpoint).
Determine the equation of the line. There's a formula for the equation of a line given a point and the slope of the line. Generate x coordinates for your region of interest. Use the equation to generate the corresponding y coordinates. Plot the generated coordinates.