Linear graphs and standard parabolae
Drag graphs by the blue and red points. Write down the equation. In some cases you can factorise the parabola. (If the graphs cuts the x-axis) Check answers by ticking the check boxes.
Parabolae and quadratic
Drag the blue or red graphs by the points. Change the red coefficient of x squared to -1 with the slide bar. Change the blue graph to have a coefficient of x squared between -5 and 5. Write down the equations and then check with tick boxes. Extra question given with check box Q.