def main():
win = graphWin("Regression Line")
allPoints = []
bestfit = Regression(win, allPoints, -10, 10)
click = win.getMouse()
click.draw(win)
p1 = win.getMouse()
p1.draw(win)
bestfit.addPoint(p1)
bestfit.addPoint(click)
bestfit.drawRegressionLine(win)
while True:
click = win.getMouse()
if ((-9 <= click.getX() <= -7) and (-9 <= click.getY() <= -8)):
break
else:
#Store user points in an appended list
bestfit.addPoint(click)
click.draw(win)
bestfit.unDraw()
bestfit.drawRegressionLine(win)
