|Date||Jul. 3rd 2009|
Extrapolating is the 605th xkcd comic.
Extrapolation uses the existing points on a graph to predict future points, often with a best fit line over the data. In this case, with only two points, the best fit model is linear and leads to the erroneous conclusion that growth will continue to increase over time, leading to multiple husbands and babies for the woman shown.
"By the third trimester, there will be hundreds of babies inside you."