As they type each inequality, it appears on the graph. Students compete to find the inequality that gets them the most points: blue dots are +1 but red dots are -1.
#Desmos graphing inequalities how to#
Overall I thought it went much better than previous years. Once students have learned how to graph inequalities, they practice with Point Collector: Lines, which is part of Desmos’ featured collection on Inequalities. I got focused on that and kind of forgot to check our solutions, so that obviously wasn’t ideal… Apparently some of my students have a lot of trouble writing basic inequalities from number lines?!? This was a surprise, and actually probably the biggest struggle of the day. More focus on writing distance statements in words and writing final solutions as inequalities without absolute value. Did a Google form warm-up to see what the understanding level was after the activity the previous day. Students filled out a summary handout at the end of the activity and checked it with my key as their wrap-up for the day.Įxtended from the previous day’s activity to talk about solving more complex absolute value inequalities. Kept everyone paced together and drew some summaries on the board as we went along. Again, slightly too long in first hour, but better. Worked through a Desmos Activity on absolute value inequalities. We never used the procedure of “make one positive equation and one negative equation and solve.” I liked it! I had students write a distance statement for each equation and solved everything with number lines (decided to do this the morning of the lesson).
We worked through some examples together. Assignment: Graphing Inequalities with the Desmos Graphing CalculatorChanda ScotTake a screenshot of each result and insert it into an Excel file to be. They did have a worksheet to practice the ideas with as homework.Įxtended from the previous day’s activity to talk about solving more complex absolute value equations (where the coefficient on the variable wasn’t just 1, or the absolute value quantity had to be isolated first). It was a bit of a mess first hour (to long), but I modified it for sixth hour and kept students paced together as a class instead of letting them work at their own speed. Flag Designs of African Countries: Enriching the Graphing of Linear. We worked through a Desmos Activity giving students a refresher on the definition of absolute value and an intro to solving basic absolute value equations. For more intricate graphs, you can also use inequalities with restrictions to shade selected parts of the graph.
Use strict inequalities ( < and > < a n d >) for dotted lines and non-strict inequalities ( and a n d ) for a solid line.I’m getting closer, but (as always) it isn’t quite there yet. With inequalities, you can add colored shading to your Desmos graph. I’ve been trying to move away from procedure and really focusing on absolute value as a measure of distance. I’ve been slowly modifying the way I teach absolute value equations and inequalities.
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