8. The point $B\left(-5 \frac{1}{4^{\prime}},-3 \frac{1}{2}\right)$ is the result of reflecting $8\left(-5 \frac{1}{4}, 3 \frac{1}{2}\right)$ in the coordinate plane. Identify the axis across which the point was reflected. (Example 3)

Step 1 ：The point $B\left(-5 \frac{1}{4^{\prime}},-3 \frac{1}{2}\right)$ is the result of reflecting $8\left(-5 \frac{1}{4}, 3 \frac{1}{2}\right)$ in the coordinate plane. Identify the axis across which the point was reflected. (Example 3)

Step 2 ：Final Answer: The point was reflected across the \(\boxed{x-axis}\)