Google Classroom
GeoGebraClasse GeoGebra

Reflecting about Y = X and Y = -X (Ver 1)

Here, we are REFLECTING Lisa's pic ABOUT A LINE. Now reposition the line so it coincides (lies on top of) the line Y = X.

In the app above, move Lisa around to get different primage points. Then, record their images in the image column.

Take a look at the table of data above. Suppose a point (a, b) is reflected about the line y = x. What would the coordinates of its image be? Express in terms of a and b.

Now reposition the line so it coincides (lies on top of) the line Y = -X.

In the app above, move Lisa around to get different primage points. Then, record their images in the image column.

Take a look at the table of data above. Suppose a point (a, b) is reflected about the line y = -x. What would the coordinates of its image be? Express in terms of a and b.