Use the given graph of the polynomial function to complete the following.
(a) Estimate the x-intercept(s).
(b) State whether the leading coefficient is positive or negative.
(c) Determine whether the polynomial function is cubic or quartic.
(a) The x-intercepts are [ ].
(Use a comma to separate answers as needed. Type an integer or a decimal.)
(b) What is the sign of the leading coefficient?
Negative Positive
(c) What is the nature of the polynomial whose graph is shown in the figure?
quartic
cubic