Question

If two variables are uncorrelated then regression lines are
(a) Parallel
(b) Perpendicular
(c) Coincident
(d) Inclined at 450

Answer 1

parllel
if you bifjfhdydjstjvc

Answer 2

The correct answer is option (b) perpendicular.

The variables are uncorrelated in regression lines when r = 0, where r is co-relation coefficient.

and r is calculated by

r = +- √b1.b2

where b1 and b2 are regression coefficients.

Co-relation is the relation between variables and it changes with the same or opposite direction of variables.

Regression between two variables is their average relation.