Question: Vegetable intake among children and parents. Vejrup, Lien, Klepp, and Bere (2008) measured the relationship between intake and availability of vegetables at dinner in surveys during 2002 and 2005. The correlation matrix summarizes some of the correlations observed in the study. Explain why the last cell in each row is a perfect positive correlation.
![1179_Vegetable.png](https://secure.tutorsglobe.com/CMSImages/1179_Vegetable.png)