How to Graph a Function in Excel. A mathematical function is a formula that takes an input, x, applies a set of calculations to it, and produces an output called y. By calculating a function at a ...

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

This guide provides step-by-step instructions with examples how to extract a substring in Excel using various text functions.

You probably use VLOOKUP() function to find exact matches in Microsoft Excel, but you can also find the closest value when you don't know the exact value.

Revise how to work out the gradient of a straight line in maths and what formula to use to calculate the value change in this Bitesize guide.