When a point (x, y) is reflected across the x-axis, the x-coordinate remains the same and the y-coordinate changes sign.
In this case, the original point at the bottom of the heart is (3 1/4, 7 1/2).
The x-coordinate remains the same at 3 1/4.
The y-coordinate changes sign from positive to negative, so 7 1/2 becomes -7 1/2.
Therefore, the coordinates for the point at the bottom of the heart in the reflected image are (3 1/4, -7 1/2).