Which transformation preserves only angle measurement?

The transformation preserves only angle measurement is dilation. This transformation helps in taking up the production of an image that is of the same shape as the main original image. The similar image formed is the one that helps in the preservation of angle and ratio that sticks by the sides of length

4+2=-2. 1+2=3. y=-2/3x+b. 2=4/3+b. 2/3=b. the answer is y= -2/3x+2/3