The zeros of a quadratic function are x = 2.3 and x = –4. The graph of the function contains the point (0, –27.6). What is the function rule?
OPTIONAL: Determine the vertex of the parabola algebraically and describe how you could use your graphing calculator to verify this solution.
OPTIONAL: Determine the vertex of the parabola algebraically and describe how you could use your graphing calculator to verify this solution.