If $(-3,1)$ is a point on the graph of $y=f(x)$, which of the following must be on the graph of $y=8 f(x)$ ? Choose the correct answer below. $(-3,1)$ $(-24,1)$ $(-24,8)$ $(-3,8)$

Step 1 ：The function \(y=f(x)\) is being scaled by a factor of 8 to get \(y=8f(x)\). This means that the y-coordinate of any point on the graph of \(y=f(x)\) will be multiplied by 8 to get the corresponding point on the graph of \(y=8f(x)\).

Step 2 ：Therefore, the point \((-3,1)\) on the graph of \(y=f(x)\) will correspond to the point \((-3,8)\) on the graph of \(y=8f(x)\).

Step 3 ：Final Answer: The point that must be on the graph of \(y=8f(x)\) is \(\boxed{(-3,8)}\).