Saturday, March 9, 2013

I'm Back Baby!!!!

I was on a bit of a twitter/blog hiatus. I think I'm back.

Here's a warm-up that I made up the other day. There's something about it that I really like. Full disclosure: Brad Fulton showed something similar at a conference with multiplying two-digit numbers. I just thought it might be fun to apply it to graphing slope-intercept form.

I like this as an activity because it helps students see how changing the slope and y-intercept gets them closer to the target. You can also set it up to have two solutions in case anybody gets lucky on the first try. And although I pretty much guide them towards graphing, a few will try simply substituting the coordinates into their equations to see which works.