HomeMathMath in Nature Math in Nature (Gr. 6 - 9) Matching exercise on math in nature Positive and Negative slopes.pgs Math in Nature.jpg Keywords: slopes, reflection, algebra I, This worksheet was created by Debbie Cannon. The author works at Harmony ISD. If you would like more information on the Tool Factory product featured in this worksheet, click here. Tool Factory | Search | Contributing Teachers | Login | EULA | Clip Art Station