Final answer:
b) The y-intercept is -1/2. The y-intercept of the line with a slope of g and passing through point U(0, -1/2) is -1/2.
Step-by-step explanation:
The y-intercept, a, is the value of y when x is zero, or the point where the line crosses the y-axis. In the given question, the line has a slope of g and passes through point U(0, -1/2). Since the y-coordinate of U is -1/2, that is the y-intercept. Therefore, the value of the y-intercept is -1/2.