atleast how I could see it- is that the more children a family has, a more motherly role is put onto the woman of the household, ending up working more hours at home and such to tend to their families. whilst men work more, hence forth their not home as much or doing outside laboring activities that can count towards this graph. more children, more work with cleaning, caring, etc. etc. :)
I would say false cause/post hoc ergo.
1/7, 2/14, 3/21, 4/28, 5/35, 6/42, 7/49, 8/56, 9/63, 10/70, 11/77, 12/84, 13/91, 14/98, 15/105, 16/112, 17/119, 18/126, 19/133, 20/140 ...
Answer:
It's either the last or second one
