The Witch of Agnesi The graph of  where a is a constant, is called the witch of Agnesi (na...

The Witch of Agnesi The graph of  where a is a constant, is called the witch of Agnesi (named after the 18th-century Italian mathematician Maria Agnesi).

a. Let a = 3 and find an equation of the line tangent to  at x = 2.

b. Plot the function and the tangent line found in part (a).