9 Homes For Sale in Maxwell, TX. Browse photos, see new properties, get open house info, and research neighborhoods on Trulia.
Most linear equations are functions (that is, for every value of x, there is only one corresponding value of y). When you assign a value to the independent variable, x, you can compute the value of the dependent variable, y. You can then plot the points named by each (x,y) pair on a coordinate grid.
An equation is linear if the sum of the exponents of the variables of each term is one. Equations with exponents greater than one are non-linear. An example of a non-linear equation of two variables is axy + b = 0, where a and b are constants and a â  0. It has two variables, x and y, and is non-linear because the sum of the exponents of the variables in the first term, axy, is two. This article considers the case of a single equation for which one searches the real solutions.