Define f(x) = –x³ + 2x² + 4x –3 and graph it in a [-7.9, 7.9] x [-6, 6] window.

1. Use the Derivative feature of the Graph Math menu to find f '(1.5).
2. Use the Tangent feature of the Graph Math menu to find the equation of the tangent line to
   y = f(x) at x = 1.5.
3. Refresh the graph screen by pressing and use the Inflection feature of the Graph Math menu to find the inflection point of y = f(x).
4. Find the intervals where the graph of f is concave upward and where it is concave downward.
5. Display the graphs of the function f and its derivative and use the graph of the derivative to determine where the turning points of f occur.
6. Use the graph of the derivative of f to determine where f is increasing and where f is decreasing.
7. Use the Derivative key to find the second derivative of

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