To rotate a point \( (x, y) \) by 90 degrees clockwise around the origin, you can use the transformation:
\[ (x, y) \rightarrow (y, -x) \]
Given the point \( A(2, 6) \):
- Identify \( x = 2 \) and \( y = 6 \).
- Apply the transformation:
\[ (2, 6) \rightarrow (6, -2) \]
Thus, after a rotation of 90 degrees clockwise, the new location of point \( A \) would be \( A'(6, -2) \).