Question

Let X = {1, 2, 3, 4, 5} and Y = {1, 3, 5, 7, 9}. Which of the following is/are not relations from X to Y?
(a) R₁ = {(x, y) | y =2 + x, x ∈ X, y ∈ Y}
(b) R₂ = {(1, 1), (2, 1), (3, 3), (4, 3), (5, 5)}
(c) R₃ = {(1, 1), (1, 3), (3, 5), (3, 7), (5, 7)}
(d) R₄ = {(1, 3), (2, 5), (2, 4), (7, 9)}

Answer 1

Step-by-step explanation:

a is the answer

mark me as a brainlist

Answer 2

Answer:

Step-by-step explanation:

C and D are not a relation because in C - 1 and 3 are matched to two numbers. In D - 7 was matched to 9 which is not possible.