Question

In the graph below, point D is reflected across the y axis. what are the coordinates of its image ?

Answer 1

(-3, -1)

Explanation:

Answer 2

Generally, whenever a point (x,y) is reflected across the y axis, the y coordinate stays the same and the sign of x coordinate changes.

So
`(x,y)` changes to
`(-x,y)`.

Point D in the diagram shown has coordinates
`(3,-1)`. According to the rule, the x-coordinate, 3, will change to -3 and the y-coordinate, -1, would stay the same.

Hence, our image of D after the reflection about y-axis would have coordinates
`(-3,-1)`.

ANSWER:
`(-3,-1)`