A quadratic graph is produced when you have an equation of the form , where and can be zero but cannot be zero.
All quadratic graphs have a line of symmetry.
Positive quadratic graphs (where ) are U-shaped and have a turning point at the bottom of the curve. Negative quadratic graphs (where ) are ∩-shaped and have a turning point at the top of the curve.
Draw the graph of
First we need to complete a table of values:
Then plot these points and join them with a smooth curve.