A linear equation is drawn as a straight line on a set of axes. To draw the graph we need coordinates. We generate these coordinates by substituting values into the linear equation.

Capture relationships between data sets by graphing linear equations in Microsoft Excel 2007. Linear equations allow you to predict values within your data set and view the overall trend.

The equations are used in calculus to describe relationships among one or more variables. A solution to any series of equations can be found by graphing both equations and finding out where they meet.

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?