http://www.stlcc.edu/Courses/Index.asp?subject=mth&course=160Ahttp://www.umsl.edu/bulletin/as/math_courses.html (MTH 1020)
I realize you did not attend either school, but a lot of schools do have graphing calculator variants for their algebra courses. (I'm not as familiar with the UMSL course, as I don't deal with math below calculus over there). I don't have statisics for UMSL, but at the community college, the graphing calculator course accounts for <5% of college algebra courses offered in a semester. A lot of the use of graphs in the course are simply because a TI-83 can't perform those functions otherwise. Were the course to require a TI-89 instead, the amount of graphing the calculator is used for would drop significantly. The decision to use a TI-83 saves the student money, especially since the graphing calculator variant is a terminal math course and most students will never touch that calculator again after the class is done.
So, my original statement stands.