Question

The image of the point (–5, 7) in y-axis has the coordinates
(a) (5, 7)
(b) (–5, –7)
(c) (5, –7)
(d) (7, –5)

Answer 1

Under reflection of a point in the y-axis, the ordinate of the point remains unchanged while the sign of the abscissa is changed. So, the image of the point (x, y) in the y-axis is (−x, y).

Thus, the image of the point (−5, 7) in the y-axis is (5, 7).

Hence, the correct answer is option (a).