Find the equation of the tangent line to the graph of the function at z=3
Find the derivative of the function using the quotient rule:
Put z = 3.
Simplify, then find the value of f(z) when z = 3.
m is f'(3), and c is a constant.
To find c, use y = f(3) and x = z
You'll get your equation of the line now. You can replace y and x by f(z) and z respectively.