| absolute value function | A function of the form f(x) = |x|.
|
 |
|
|
| average rate of change | The ratio of the change in y to the change in x.
|
|
|
|
| constant function | A function of the form f(x) = k for some constant k.
|
|
|
|
| direct variation | The relationship between two quantities, x and y, such that y = kz, where k is a constant.
|
|
|
|
| function | A set of ordered pairs of real numbers in which no two have the same first and different second coordinates.
|
|
|
|
| horizontal line test | A visual method for determining whether a function is one-to-one.
|
|
|
|
| inverse of the function f | A function in which the ordered pairs of f are reversed.
|
|
|
|
| inverse variation | The relationship between two quantities, x and y, such that y = k/x, where k is a constant.
|
|
|
|
| joint variation | The relationship between three quantities, x, y, and z, such that z = kxy.
|
|
|
|
| one-to-one function | A function in which no two ordered pairs have the same second coordinate and different first coordinates.
|
|
|
|
| relation | Any set of ordered pairs.
|
|
|
|
| sum of f and g | The function (f + g)(x) where (f + g)(x) = f(x) + g(x).
|
|
|
|
| synthetic division | A quick method for dividing by x - c.
|
|
|
|
| varies directly | A function of the form y = kx where k is a non-zero constant.
|
|
|
|
| varies inversely | A function of the form y = k/x where k is a non-zero constant.
|
|
|
|
| vertical line test | If there is a vertical line that crosses a graph more than once, then the graph is not the graph of a function.
|
|
|
|
| zero of a function | A number a such that f(a) = 0.
|
2002 McGraw-Hill Higher Education