Problem
Hosted by Alfks Corp. Unit 4 Test Question 24 of 25 (4 points) Attempt 1 of 1 (1) 1 h $25 \mathrm{~m}$ Remaining 1-10 Find $y$-intercept of a quadratic function (Application 9) The height of a home run $x$ feet from home plate can be approximated by the function $f(x)=-0.00186 x^{2}+0.6282 x+2.1$. How high was the ball at the time it was hit? The ball was feet high at the time it was hit.
Solution
Step 1 ：The height of the ball at the time it was hit is the y-intercept of the function. The y-intercept is the value of the function when x equals 0. So, we need to substitute x=0 into the function and calculate the result.
Step 2 ：y_intercept = 2.1
Step 3 ：Final Answer: \(\boxed{2.1}\)
