Trigonometric graphs can be sketched when you know the amplitude, period, phase and maximum and minimum turning points. Learn about graphs of trigonometric functions in this National 5 Maths guide.

An equation of the form \(y = mx + c\) where \(m\) and \(c\) are numbers, gives a straight line when values of \(x\) and corresponding values of \(y\) are plotted on a grid. A straight line is a ...

Ellie is an award-winning investigative reporter who has written about retail issues at Which? for more than 12 years. In this article Food inflation in 2025 Which supermarket has the fastest-rising ...