m (x,y) --> (-x,y) is what transformation reflection rotation or translation

Question

m (x,y) --> (y, -x) is what transformation reflection rotation or translation

m (x,y) --> (2x,2y) is what transformation reflection rotation or translation

how do you do this what are some good videos to watch?

Answer 1

reflection through the y-axis
reflection through the line y = -x
scaling by a factor of 2

a simple web search will provide many references and videos on the topic.