Number Review More

More review problems:

1. Make an ellipse on a background.

   • The ratio of the width to the height of the ellipse is 3 to 4.
   • The x-coordinate of the mouse controls the width.
   • Hit any key to reset the ellipse to 60 by 80.

2. A point moves on the graph of y = abs(x-90).

   • The point starts at (0,90).
   • The point goes back to (0,90) after it gets to (200,110).
   • The origin is in the lower left (people coordinates, quadrant I).
   • Moving the mouse makes the point go faster.

3. A straight line goes through (50,25) and the point where the mouse is.

   • Racket Help Desk: Drawing a line

Solutions: 1, 2, 3.