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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.

Solutions: 1, 2, 3.