Which of the followings are relations from {x, y, z} to {a, b, c, d} {(a, x),(b,y), (c, z)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(x, c), (y, y)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} ,{(x, d),(y, b),(z, c)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(x, a),(x, b),(x, c), (x, d),(y, a) (y, b),(y, c),(y, d)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} {a, b, c, d, x, y, z}

If A={1,2,3},B={a,b,c} which of the following are relations from A to B? R5={(1,d),(2,c),(3,a)}

If A={1,2,3},B={a,b,c} which of the following are relations from A to B? R4={(2,c),(3,c),(4,c)}

Which.of the following relations are functions?f= {(a, x), (b, y), (c, z)}

In the set of integers Z, exmine whether the following relations are equivalence relations or not : R={(a,b) : a,b in Z and a

In the set of integers Z, exmine whether the following relations are equivalence relations or not : R={(a,b) : a,b in Z and a>b}

In the set of integers Z, exmine whether the following relations are equivalence relations or not : R={(a,b) : a,b in Z} and a-b is divisible by 2.