 ## CCSS.MATH.CONTENT.7.RP.A.1

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### Another factor in the mortgage crisis was the use of adjustable rate mortgages. Students run a number of scenarios to test adjustable rate mortgages, while also taking into account the state of the housing market during the time of the mortgage crisis. This video includes a Video Transcript: https://www.media4math.com/library/video-transcript-algebra-applications-data-analysis-segment-4-what-adjustable-rate-mortgage A Promethean Flipchart is available for this video: https://www.media4math.com/library/promethean-flipchart-algebra-applications-what-adjustable-rate-mortgage ### Why do rivers meander instead of traveling in a straight line? In going from point A to point B, why should a river take the circuitous route it does instead of a direct path? Furthermore, what information can the ratio of the river’s length to its straight-line distance tell us? In this segment the geological forces that account for a river’s motion are explained. In the process, the so-called Meander Ratio is explored. Students construct a mathematical model of a meandering river using the TI-Nspire. Having built the model, students then use it to generate data to find the average of many Meander Ratios. The results show that on average the Meander Ratio is equal to pi. This video includes a Video Transcript: https://www.media4math.com/library/video-transcript-algebra-applications-variables-and-equations-segment-3-river-ratios A Promethean Flipchart is available for this video: https://www.media4math.com/library/promethean-flipchart-algebra-applications-river-ratios ### The definition of the term "Rate." ### In this Slide Show, do a hands-on geometry activity to measure π. Note: The download is a PPT file. ### Ratios and Rates: Example 1. Calculating a 1:1 ratio. ### Ratios and Rates: Example 2. Calculating a 1:2 ratio. ### Ratios and Rates: Example 3. Calculating a 1:3 ratio. ### Ratios and Rates: Example 4. Calculating a 1:4 ratio. ### Ratios and Rates: Example 5. Calculating a 1:5 ratio. ### Ratios and Rates: Example 6. Calculating a 2:1 ratio. ### Ratios and Rates: Example 7. Calculating a 2:3 ratio. ### Ratios and Rates: Example 8. Calculating a 2:5 ratio. ### Ratios and Rates: Example 9. Calculating a 1:2:1 ratio. ### Ratios and Rates: Example 10. Calculating a 1:3:1 ratio. ### Ratios and Rates: Example 11. Calculating a 1:4:1 ratio. ### Ratios and Rates: Example 12. Equivalent ratios for 3:4:5 right triangles. ### Ratios and Rates: Example 13. Equivalent ratios for 5:12:13 right triangles. ### Ratios and Rates: Example 14. Equivalent ratios for 30-60-90 right triangles. ### Ratios and Rates: Example 15. Equivalent ratios for 45-45-90 right triangles. ### Ratios and Rates: Example 16. Calculating rate for distance vs time. ### Ratios and Rates: Example 17. Calculating rate in dollars per gallon. ### Ratios and Rates: Example 18. Calculating rate in cost per pound. ### Ratios and Rates: Example 19. Calculating rate in gallons per hour. ### Ratios and Rates: Example 20. Dimensional analysis: Converting feet to inches. ### Ratios and Rates: Example 21. Dimensional analysis: Converting feet to yards. 