Revise how to recognise and determine the equation of a quadratic function from its graph. BBC Bitesize Scotland revision for SQA National 5 Maths.

The roots of the equation y = x 2 x 4 are the x-coordinates where the graph crosses the x-axis, which can be read from the graph: x = 1.6 and x = 2.6 (1 dp).

R. S. Falk, P. B. Monk, Logarithmic Convexity for Discrete Harmonic Functions and the Approximation of the Cauchy Problem for Poisson's Equation, Mathematics of ...