Consider the quadratic equation x2 - 6x - 16 = 0. A. Solve the equation, and discuss how the type of roots affects the appearance of the graph of the function y = x2 - 6x - 16. B. What is the vertex of the graph of x2 - 6x - 16 = 0? C. What is the equation of the axis of symmetry? D. Use this information to draw a rough sketch of the graph of the function.