Question

Point B (1 -3) is reflected across the x-axis to point D. What are the coordinates of point D?

Answer 1

D (1;3).

Explanation:

1) the condition 'across the X-axis' means the x-coordinate is not changed, the y-coordinate is changed to positive value. Then

2) the required coordinates of point D are (1; 3).

note, the suggested option is not the only one.