It's time to deal with the cold as only a math class can with this timely activity.
The students are given a list of coordinate points, however, 30 of the coordinate points have been replaced by matrix equations. The students should first find the solutions to each of the matrix equations.
Then using the solutions as the missing coordinate points the students should connect all the points only within the designated zones. When they are done, they will have graphed a picture of a Winter Time Thermometer.
A copy of the Winter Time Thermometer - A Coordinate Graphing Activity is included and is intended to be used as an answer key.
Here are some tips:
 All points will be on one grid line or another.
 A completed picture has been provided to be used as a key.
 I have found that printing graph paper directly from themathworksheetsite.com helps out, but any graph paper will do.
 Remember to copy double-sided to save paper.
If you like this Winter Time Thermometer activity, you might also like one of these other variations.
Winter Time Thermometer - A 30 Systems and Coordinate Graphing Activity
Winter Time Thermometer - A Coordinate Graphing Activity
I highly recommend using Desmos.com
for these activities.
Winter Time Thermometer - A Linear Discovery and Graphing Activity
Winter Time Thermometer - A Linear Equations Graphing Activity