Desmos slider go left-wards
Fragment of a discussion from Science talk:Math Exam Resources/Courses/MATH110/December 2012/Question 02 (a)
Looking at positive values is fine. But since we are interested in lim_{x \rightarrow 0+} it would be nice if the values of a decrease to zero, instead of increase away from zero. Maybe using -a instead would do the trick? Luxury problems :)