Final answer:
The y-intercept of the polynomial function is (0, 5).
Step-by-step explanation:
The y-intercept, a, of a polynomial function describes where the plot line crosses the y-axis. In this case, we are given the options a) (0, -5), b) (0, 5), c) (0, -10), and d) (0, 10). The y-intercept occurs when x is zero, so we need to find the option where the y-coordinate is zero. From the given options, the correct answer is b) (0, 5).