Question

let A and B be the set of lines in xy plane such that A consists of line parallel to X-axis.For x belongs to A,y belongs to B,let R be the relation from A to B defined by xRy if x is perpendicular to y
​

Answer 1

Answer:

Let L denote the set of all straight lines in a plane. Let a Relation R be defined on L by ⇔∣∣ xRy⇔x∣∣y, for ,∈

then R is equivalence relation