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2nd foray

Having done graphing with Maple the other day, we worked a little bit with solving systems of equations by substitution. One of the students mentioned that instead of assigning names by typing "L1:=y=3x+2" you could avoid the first equal sign and just use a colon.
Well, that was okay for graphing, since you just right-clicked and chose plot. However, it doesn't work because the assignment to L1 isn't made, so when you tried to do a substitution into L1, it didn't exist.
Some of the students in the 2nd section had a challenge with the 2nd line they dropped on to the graph only had domain -10 to 10... wasn't sure why that was happening.
The second section does algebra on Friday ... and we'll do more algebra with it next week!
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