Unlike a linear, graph, a quadratic graph has an equation which includes an x squared term.

Learn and revise how to solve quadratic equations by factorising, completing the square and using the quadratic formula with Bitesize GCSE Maths Eduqas.

But how do you come up with a function to fit data? The basic idea is to create a quadratic function and vary the parameters such that the deviation of the actual data from the function is minimized.

Make your R data.table code more efficient and elegant with these special symbols and operators. Plus, learn about the new fcase() function ...

Here are eight stunning dinner sets that mix beauty and function. Featuring Cello, Borosil, Corelle and more, these picks bring charm to any table.