Revise how to identify the y-intercept, turning point and axis of symmetry of a quadratic function. BBC Bitesize Scotland revision for SQA National 5 Maths.

In the example of 3a, the coefficient of a is 3 because 3 x a = 3a. of \(x^2\) is positive, so the graph will be a positive U-shaped curve with a minimum turning point.