Final answer:
The y-intercept of the function f(x) = 3x² + 5 is the point where the value of x is 0. After calculation, the y-intercept is the point (0, 5).
Step-by-step explanation:
The y-intercept of a function is the point where the graph of the function crosses the y-axis. To find the y-intercept of the function f(x) = 3x² + 5, you need to determine the value of f(x) when x is 0. Plugging x = 0 into the function, we get f(0) = 3(0)² + 5 = 5, so the y-intercept is at the point (0, 5).