Question

If the trapezoid below is reflected across the x-axis, what are the coordinates of B'?

A.
(8, –3)

B.
(3, –8)

C.
(–3, 8)

D.
(–8, –3)

Answer 1

The x-coordinate remains the same as the x-coordinate of point B.
The y-coordinate becomes the additive inverse of the y-coordinate of point B.

Answer: B. (3, -8)

Answer 2

B. (3,-8)

Explanation:

We are given the trapezoid with point B having the co-ordinates (3,8).

Now, the trapezium is reflected across x-axis to form another trapezium.

Since, we have,

Reflection across x-axis changes the co-ordinate (x,y) to (x,-y).

So, we get,

The co-ordinates of B' are (3,-8).

Hence, option B is correct.