Fig. 3
From: The reciprocal effects of physical activity and happiness in adolescents
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12966-020-01058-8/MediaObjects/12966_2020_1058_Fig3_HTML.png)
The association between the number of steps per day and happiness in adolescents. Note. Grey dots are the observed values, the red line is the estimated linear coefficient