import java.awt.Graphics;
import javax.swing.JApplet;

public class Parabola extends JApplet {
	@Override
	public void paint(Graphics g) {
		super.paint(g);
		double a = -0.0025, b = 1, c = 0;
		for (int x0=0; x0<200; x0+=10) {
			double y0 = a * x0 * x0 + b * x0 + c;
			int x1 = x0 + 10;
			double y1 = a * x1 * x1 + b * x1 + c;
			g.drawLine(x0, (int)y0, x1, (int)y1);
			System.out.printf("(%d, %.1f) -- (%d, %.1f)", x0, y0, x1, y1);
		}
	}
}