Unformatted text preview: linear equation, such as y = x², is a function, though not a straight line, because for any value of x there exists one and only one value of y. An example of a nonfunction would be y = ± x. In this case, for any value of y, there exists two values of x. Therefore, it is not a function. All linear equations are functions though because by definition linear equations are polynomials, and all polynomials are linear equations; however, a linear equation is NOT a function if it is degenerate. Here is a nonlinear function: f(x) = x^2 + x + 6 Inputs: f(2) and f(0) f(2) = 2^2 + 2 + 6 = 4 + 2 + 6 = 12 f(0) = 0^2 + 0 + 6 = 0 + 0 + 6 = 6...
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 Spring '09
 JESS
 Math, Linear Equations, Equations, Quadratic equation, Elementary algebra, Quintic equation, Nonlinear system

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