Infrastructure Investments The figure shows a graph of capital expenditures (in bill...

Infrastructure Investments The figure shows a graph of capital expenditures (in billion dollars) by the U.S. cable television industry from 1998 through 2008.

a. List the labeled points in order of increasing steepness.

b. List the labeled points in order of increasing slope.

c. Is the graph concave up, concave down, or neither at each of the labeled points?

d. Draw a tangent line at point C. Calculate and interpret the slope of this tangent line.