Learn how to calculate the equation of a line from a graph, work out the gradient from an equation, and visualise intercepts with this step-by step guide.

Least squares regression equations How do you calculate a least squares regression line by hand? Drawing a least squares regression line by hand What are the disadvantages of least-squares regression?

Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have ...