Composite functions are made when the output from one function is used as the input of another function. The names of the functions are written next to each other, with the function that is used first ...

The equation of a straight line can also be written in the form \(f(x) = mx + c\). This is called function notation and is just another way of expressing the relationship between two variables.

Neil Saunders is a supporter of The Campaign for Mathematical Sciences. In 2025, more young people than ever have opened their A-level results to find out how they did in their maths exam. Once again, ...