9. use the function to answer the following questions.
part i: what is the y-intercept of this function? express your answer in the form. (4
points)
part ii: use the formula for finding the x-coordinate of the vertex to solve for both coordinates of the vertex. express your answer in the form.
part iii: use the quadratic formula to find the coordinates of the x-intercepts of the function's graph round your answers to the nearest hundredth. express your answer in the form.