Hey jishka teachers I hope yall are having a great day that God has given us I was wandering if you can help me work this out so I can understand

Question

Triangle DEF has coordinates D(2, 5); E(-1 5); F(1, 2). Find the coordinates of the image D’E’F’ after a reflection across the y-axis

the question didn't provide an image I hope you can help me understand it good as possible

Answer 1

think about it. Reflection across the y-axis just changes the sign of all the x-coordinates.

(x,y) -> (-x,y)

Answer 2

thanks for the detail but I'm still confused

Answer 3

for example, (3,-2) -> (-3,-2)
Just change the sign of the x-coordinate of each point.

If you don't know which is x and which is y, you have some serious catching up to do. Better review the topic again.

Also, google can provide you with many examples, and even videos.

Answer 4

ok thank you for using your time to help me ill see if my teacher can explain it more to me and you are right I do have some catching up to do thank you very much.

Answer 5

so it would be D(-2, 5); E(-1 5); F(-1, 2). ??