Rewrite the following statement with "if then" in five different ways
(1) r : If a point lies y-axis then its x-coordinate is zero

Explanation

(a) (i) A point lies on y-axis , implies its x co-ordinate is zero
(ii) Knowing that a point lies on y-axis is sufficent to conclude that it it's x-co-ordinate is zero
(iii) A point lies on y-axis only it it's x-ordinate is zero
(iv) To lie a point on y-axis it is necessary that it's x-xcoordinate is zero
(v) If x-coordinate of a point is not zero then it will not lie on y-axis