What is the $y$-intercept of the line: \[ -3 x+8 y=24 \]

Step 1 ：The y-intercept of a line is the point where the line crosses the y-axis. This occurs when x = 0.

Step 2 ：Substitute x = 0 into the equation -3x + 8y = 24 and solve for y.

Step 3 ：Doing so, we get 8y = 24.

Step 4 ：Solving for y, we get y = 3.

Step 5 ：Final Answer: The y-intercept of the line is \(\boxed{3}\).