For novices, functions are one of the most intimidating features of OpenOffice.org's Calc. Newcomers quickly learn that functions are a main feature of spreadsheets, but there are almost four hundred, ...

Determining the equation of a straight line Function notation The equation of a straight line can be worked out using coordinates and the gradient, and vice versa.

Revise algebraic formulae for your maths GCSE foundation and higher exams with Bitesize interactive practice quizzes covering feedback and common errors.