The correct description of the dilation of triangle ABC with a scale factor of 5 and a center point of dilation at the origin (0, 0) is:
Triangle A′B′C′ is 5 times as large as triangle ABC and is 5 times as far from the center point of dilation.
In dilations, when the scale factor is greater than 1, the resulting shape (A′B′C′) becomes larger than the original shape (ABC), and its vertices move away from the center of dilation, which in this case is the origin. Thus, with a scale factor of 5, each side of triangle A'B'C' will be 5 times the length of the corresponding side of triangle ABC, and the vertices of triangle A'B'C' will be 5 times farther from the origin than those of triangle ABC.