Question

Point K is located at ( 17 , − 21 ) . If point K is reflected across the x -axis, what are the coordinates of the reflected point?

Answer 1

(17,21)

Explanation:

Note that if a coordinate point is reflected over the x axis, the y axis of the coordinate will be negated while the x coordinate is unchanged.

For example, if a coordinate (x,y) is reflected over the x axis, the resulting coordinate of the reflected point will be (x, -y)

Note that the y coordinate was negated.

Applying this to the question

Given the coordinate point (17, -21). If reflected over the x axis, the coordinate of the reflected point will be (17, -(-21)) which will be (17,21)