After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are a (6,3), b'(-2, 1),
and c (1,7). what are the coordinates of the vertices of the pre-image?
a (-6,-,6)(3,-6)(3,6)
b (-1,2)(1,2)(2,-1)(2,1)
c (-7,-,-7)(1,-7)(7,-1)