/*
 *  Simple "graphing calculator" to sketch the function:
 *    y = 0.01 * (x-300)^2
 *
 * Note well that the Processing coordinate system is
 * inverted relative to the traditional math orientation.
 */

size(600, 400);

background(255);
noFill();

beginShape();
for (int x=0; x <= width; x++) {
  float y = 0.01 * (x-300)*(x-300);
  vertex(x,y);
}
endShape();