which linear function is represented by the graph?
Linear Functions: Any function of the form f (x) = m x + b, where m is not equal to 0 is called a linear function. The domain of this function is the set of all real numbers. The range of f is the set of all real numbers. The graph of f is a line with slope m and y intercept b. Note: A function f (x) = b, where b is a constant real number is called a constant function. Its graph is a horizontal line at y = b. You need only two points to graph a linear function. These points may be chosen as the x and y intercepts of the graph for example.