Answer:
reflection in the y-axis
Step-by-step explanation:
Point (-a, a) means:
go a units left and a units up
Falls in 2nd quadrant
Point (a,a) means:
go a units right and a units up
Falls in 1st quadrant
You will see that they are reflections of each other about the vertical axis. Which is the y-axis.
So, the points are "reflection in the y-axis".
Note: We took a = 2 and plotted (-2,2) and (2,2) in the image attached to show the reflection.
