When a point \( (x, y) \) is reflected across the x-axis, the new coordinates become \( (x, -y) \).
Given the point at the bottom of the heart \( (3.25, 7.5) \), we can reflect it across the x-axis:
- The x-coordinate remains the same: \( 3.25 \)
- The y-coordinate changes from \( 7.5 \) to \( -7.5 \).
Thus, the coordinates for the point at the bottom of the heart in the reflected image are \( (3.25, -7.5) \).