Consider the polynomial function y = 8x^3 - 4x^5 + 2x^7 - 4 + 9x to answer item numbers 3 to 5.
3. What is the constant term?
A. 9
B. 9x
C. 4
D. - 4
4. What is the leading term?
A. 2x^7
B. 2
C. 8
D. 8x^3
5. What is the degree of the polynomial function?
A. 16
B. 7
C. 3
D. 1