A triangle has points A(1, 2), B(1, 6), and C(3, 6) and is reflected over the x-axis. A'B'C' are the coordinates of the reflected image. What is the C' coordinate?

reflection changes (x,y) --> (x,-y). So,

A(1,2) --> A'(1,-2)
etc.

To find the coordinates of the reflected image, we need to reflect each point of the original triangle over the x-axis.

Given the coordinates of point C as (3, 6), the reflection over the x-axis can be obtained by changing the sign of the y-coordinate. Therefore, the y-coordinate of the reflected image C' will be the negative of the original y-coordinate, which is -6.

Hence, the coordinates of point C' will be (3, -6).