There are 16 color images in this file....and there are 2 sets- one labeled and one not labeled.
Each set represents the following tiles:
+1, -1, x, -x, x squared, and -x squared.
These are png images that can be inserted into a product you are making. Each image is 300 dpi. They may be used for personal, classroom, and commercial use. Please see the TOU upon purchase for a full description of how images may be used.