Question

A point p has coordinates (-5,4). What are its new coordinates after reflection point p over the y axis

Answer 1

(5, 4)

Explanation:

The general rule for reflection of a point along y-axis is:

• y-coordinate of the point will stay the same
• the sign of x-coordinate will be inverted i.e. positive sign will change to negative and vice versa.

i.e. the point (x, y) after reflection along y-axis will be (-x, y)

The given point is (-5, 4). Using the above rule for this point, the new point after reflection will be (5, 4) i.e same y-coordinate but x-coordinate with inverted sign.