GCSE; WJEC; Equations of curves - Intermediate & Higher tier – WJEC Solving quadratic equations graphically - Higher. Quadratic, cubic and exponential graphs are three different types of curved ...

In order to draw the curve on a graph we require several pairs of coordinates. These coordinates represent the relationship given in the equation. Eg y = 4 – x² ...

The bottom part is a graph of the equation, which, as you can see, is exactly the same. To be fair, this equation cheats a little bit. You may notice that the y-axis of that graph begins at ‘k’.