7th Grade Ex Cr due April 8, 2013

1. Re read pg. 5 1.1 Walking Marathons and pg. 6 Problem 1.1 Finding and Using Rates. 2. Go outside. You are about to model the activity we did in class two weeks ago. Measure off a section of land or sidewalk. Record the distance (in units). Ask a friend to help you. Obtain a stopwatch (or some way to measure seconds). Record the time it takes to do from section to the far end of the section while walking. Now, repeat the process while running. 3. Now, watch the video below to figure out the next part of your extra credit. 4. Answer the following questions, remember D = r(t) or M = r(s): a) If you were walking at your rate, how far did you travel in 30 seconds? If you were running at your rate, how far did you travel in 30 seconds? b) If you were apart of a walkathon and charged $5 per unit you walked, how much money would you get if you walked for 60 seconds? How much money would you get if you ran for 60 seconds?