Question

The point A(4,10) is reflected across the x axis. Where is a?

Answer 1

the answer is c, (4,-10)

Answer 2

Reflection across the x-axis puts the image point as far below the x-axis as the original is above. That is, it changes the sign of the y-coordinate.

The image of A(4, 10) is A'(4, -10).

Selection c. (4, -10) is appropriate.