The pre-image of a triangle are a(-3,1), b(-1,0) and c(-1,4) if c maps to c' (-3,0) what's the rule of the translation and the coordinates of a' and b'

To get from C(-1, 4) to C'(-3,0), we must subtract the x value by -2. This gets us -3 (-1-2=-3). To get from 4 to 0, we must subtract the y-values by 4. This gets us a translation of 2 left and 4 down or T₋₂,₋₄