A big part of Middle School Maths is data handling, and a big part of that is data presentation in the form of graphs and charts. This leads to discussing and/or analysing data, which then reappears in Humanities, Sciences and even Physical Education. So let's take advantage of that in our English classes.
Meanwhile, we are not preparing our students for life if they cannot see through a politician's or advertiser's use (or misuse) of graphical presentations.