8.3.7.06: Identify graphical properties of linear functions in the form f(x) = mx + b, including slope, y-intercept and x-intercept. Know that the graph is a straight line, the slope (m) equals the rate of change, the y-intercept (b) is the value of the function at x = 0 and the x-intercept is the value of the function at f(x) = 0.