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outputs the coordinates of the points to a file
PlotPoints(L: LIST of points)
This function outputs the coordinates of the points (with two
components) to a file called "CoCoAPlot".
for outputting to another file.
This result can be plotted using your preferred plotting program.
For example, start "gnuplot" and then give it the command
to see the plot.
/**/ PlotPoints([ [X, X^2-X+14] | X in -10..10]);
21 plotted points have been placed in the file CoCoAPlot