f (3) = lim lim h-0 h Part 2: The derivative function Use the definition of the derivative to compute the derivative of the function f(z) = 1 - 7x at an arbitrary point x, Evaluate the limit by using algebra to simplify the difference quotient (in first answer box) and then evaluating the limit (in the second answer box). f' (z) = lim f (z + h) - f(z) = lim h40 h h40 - Part 3: The tangent line ulate the tangent line to the function f(x) = 1 - 7x atz = 5