linear equation n. An algebraic equation, such asy= 2x+ 7 or 3x+ 2y-z= 4, in which the highest degree term in the variable or variables is of the first degree. The graph of such an equation is a straight line if there are two variables. ...
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The equation, written in this way, is called the slope-intercept form. These functions can also be written as y = ax + b (common in linear regression) or y = a + bx. These all represent the same graphs. Examples of linear functions: f(x) = x, f(x) = 2x – 2, f(x) = x...