Before hitting the start button, pause briefly to study the table. You can return to the table at any time by pressing the SPACEBAR. When the screen opens, you can press the graph button to activate the graph. Domain x is the small green x. Observe the action: as the value of domain x changes (from left to right), there is a corresponding change in the value of y (known as f(x)). The pen plots the curved path.
The green X sprite marks the horizontal values. The red dot plots the f(x) values. The donut pen sprite graphs the quadratic equation. The vector grids by Seamus O'Neill make this dynamic graph possible. To receive a Scratch2 version (with operating +/- sliders) email me at seamus(at)readysteadycode.ie.
