Discrete Maths - Sets
138. Which of the following relations are functions?
I. N = {(x, y)/y = x², x ∈ {-1, 0, 1, 2, 3}}
II. P = {(x, y)/y² = x, x ∈ {4, 9, 16})
III. Q = {(x, y)/y = 4x² -14, x ∈ {-1, 1, 2, 3}}
138. Which of the following relations are functions?
I. N = {(x, y)/y = x², x ∈ {-1, 0, 1, 2, 3}}
II. P = {(x, y)/y² = x, x ∈ {4, 9, 16})
III. Q = {(x, y)/y = 4x² -14, x ∈ {-1, 1, 2, 3}}
