For A = {(-4, -20), (-3, -9), (-2, -4), (-1, -11), (-1, -3), (1, 2), (1, 5),

Question:

For A = {(-4, -20), (-3, -9), (-2, -4), (-1, -11), (-1, -3), (1, 2), (1, 5), (2, 10), (2, 14), (3, 6), (4, 8), (4, 12) define the relation R on A by (a, b) R (c, d) if ad = bc.
(a) Verify that R is an equivalence relation on A.
(b) Find the equivalence classes [(2, 14)], [(-3, -9)], and [(4, 8)].
(c) How many cells are there in the partition of A induced by R?