Given that CDEF maps to JKLM ,with the transformation (x, y) ---> (5x, 5y) ---> (x - 4, y - 4).
This means that each part of CDEF is increased by a factor of 5 and then moved 4 places to the left to get JKLM.
Thus, the ratio of any part of CDEF to the corresponding part in JKLM is 1 : 5.
Therefore, EF / LM = 1 / 5.
