The y-intercept of a function is the point where the graph of the function intersects the y-axis. In other words, it is the value of the function when x = 0. For the function f(x) = x^3 + 10x^2 + 27x + 18, we can find the y-intercept by substituting x = 0 into the equation and solving for f(x):
f(0) = 0^3 + 10 * 0^2 + 27 * 0 + 18 f(0) = 18
Therefore, the y-intercept of the function f(x) = x^3 + 10x^2 + 27x + 18 is (0, 18).