Recognize whether information given in a table, graph, or formula suggests a directly proportional, linear, inversely proportional, or other nonlinear relationship. SPI 0706.1.3

Links verified on 6/9/2014

1. Cat and Mouse: Direct and inverse proportion - The problem is actually a great opportunity to teach direct variation and inverse variation.
2. Direct Proportion - a 37 slide PowerPoint show with effective animation, many examples and practice problems - UK units are used - you might want to remove slides 7, 17, 23, 30, and 37 which refer to a specific textbook
3. Directly Proportional - the explanation includes a link to an Excel workbook which supports understanding of the topic
4. Graph of Direct Proportionality - two sample video lessons [0:47 and 0:46 in length] show collected data and graphs
5. Index of Direct Proportion Resources - sample resources from a UK company
6. Index of Inverse Proportion Resources - sample resources from a UK company
7. Inverse Proportion - a 17 slide PowerPoint show with good examples, step by step solutions and good graphs [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
8. Inverse Proportions - from the Learning Math series posted by Annenberg - includes practice problems and interactive applets