Question

Which choice shows the coordinates of C' if the trapezoid is reflected across the y-axis? On a coordinate plane, trapezoid A B C D has points (2, 1), (3, 5), (5, 3) and (3, 1).

Answer 1

A

Explanation:

(-5,3)

Answer 2

`C'\ = (-5,3)`

Explanation:

Given

`A = (2, 1)`

`B = (3, 5)`

`C = (5, 3)`

`D = (3, 1).`

Reflection across y-axis

Required

Coordinates of C'

When a point is reflected across the y-axis, the rule is:

`(x,y) \to (-x,y)`

So, the reflection on C will be:

`C\ (5,3) \to C'\ (-5,3)`