With U.S. Census Bureau data, the model that relates the average annual earnings (in thousands of dollars) of females, F, and males, M, with various levels of educational attainment was found to be
F = 0.78M - 1.316
(a) Use a graphing calculator to graph this equation for the range M-min = 0, M-max = 70; F-min = 0, F-max = 60.
(b) The point (50, 37.684) lies on the graph of this equation. Explain its meaning.
(c) Find the average annual female earnings that correspond to male earnings of $62,500?