THE RUBBER BANDS

Yesterday in the math class that I substituted for, three Seniors at Dos Pueblos found a very large bag of rubber bands. They were the teacher's rubber bands, but that wasn't stopping anybody. The guys were using them to shoot small pieces of paper at each other. I took the rubber bands away and said that I wouldn't write their names down unless I saw them messing around again.

I'm supposed to be the 'nice' sub!

About five minutes later, out of my periphery I see a rubber band held low and a paper flying towards someone's back.

Their names were recorded. In black ink.

And just in case you were wondering what kind of math it was that these sophomores, juniors, and seniors were doing, here is a sample question from their work:

-1 - (9)= ?

also:

Two lines are on a graph. Without using a calculator or drawing a graph, find out where the lines intersect:

y=1/3X+5
y=x-3