Rotation of line about point produces incorrect equation
1. Type line equation, y=2x-3 into Algebra view of GeoGebra.
2. Then through Tools view of GeoGebra, rotate the image of that line through 90, 180, and 270 degrees to produce three(3) additional line equations.
The equation of the new image of the line after the first rotation is incorrect(and seems a duplicate of the original line equation), but the 2nd and 3rd equations after rotation are correct.
See this link to GeoGebra project to see evidence.