4. Consider the following equation: y = 3x-6x-24 a. Write the equation in its related function form. b. Use the vertex formula to find the vertex. c. Solve the zero equation: 3x-6x-24=0. Use the method of your choice. d. Graph the function. Plot and label x- and y-intercepts, the vertex, and any other relevant points. e. State the axis of symmetry. f. Is the graph concave up or concave down? g. Use interval notation to state the interval where the graph is increasing. h. Use interval notation to state the interval where the graph is decreasing. i. Calculate the discriminant. Then, based on the discriminant, identify the number of real solution