Which transformations were used to create a’b’c’? 1. dilation by a scale factor of 1/2 and a reflection across the y axis 2. dilation by a scale factor of 2 and a reflection across the y axis 3. dilation by a scale factor of 2 and a rotation of 90° clockwise about the origin 4. dilation by a scale factor of 1/2 and a rotation of 90° counterclockwise about the origin