Question:

In correlation, which of the following tells us that we have a perfect positive relationship

A.

r = +1

B.

all the points on the scatter diagram would fall on a straight line and the slope would be from bottom left to top right of the plot

C.

the dots on the scatter diagram would fall in a straight line from top left-hand corner down to bottom right hand corner

D.

both a and b

Answer» d. both a and b