How to use the point drawing method to draw quadratic functions on the geometric sketchpad

How to use the point drawing method of the geometric sketchpad to draw a quadratic function? In response to this problem, PHP editor Zimo has brought you detailed operation explanations. This article will guide you step by step to use the point tracing method to draw accurate quadratic function images, helping you easily master the powerful functions of the geometric sketchpad. Stay tuned below for a complete guide to graphing quadratic functions.

The first step is to define three coordinate points

Determine the three coordinate points: (2, 2), (-2, 2), (1, -1).

The second step is to trace points and draw pictures

(1) Open the geometric sketchpad software, click [Customized Tools] - [Function Tools] - [Parabola passing through three points 1] on the left toolbar. Then the plane rectangular coordinate system will automatically appear, as shown in the figure, so that the coordinate points can be easily found.

(2) Click [Custom Tools] - [Function Tools] - [Parabola passing through three points 2] on the left toolbar, and find three points (2) in the coordinate system , 2), (-2, 2), (1, -1) and click to automatically generate a quadratic function image and display the function analytical formula in the upper left corner.

The third step of image adjustment

(1)Scale adjustment

If you feel that the scale marked on the coordinate axis is too much or too little, we can Find a unit point on the x-axis near the origin. Press and hold the left mouse button and drag left and right to adjust the density of the points.

(2) Position adjustment

If you feel that you are not satisfied with the position of the coordinate axis, you can adjust the position by pressing and holding the red dot above the origin and dragging. changes.

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