Page 1 WIR Math 131 copyright Joe Kahlig 07a Week in Review 7 Sections 5 1 Things to know Be able to compute a left sum or right sum for a data set Be able to estimate total change using a graph 1 Filters at a water treatment plant become less effective over time and hence the amount of pollution passing through the filters increases over time The rate that pollution passes through the filters is given by the table Day rate kg day 0 3 7 14 21 5 8 15 28 35 25 45 a Estimate the amount of pollution passing through the filters during the 35 days using the following methods i left sum ii right sum iii average of the two previous results b Which of the estimates is a lower estimate upper estimate 2 The function graphed is the speed meters minute of somebody ridding a bike Give the total distance traveled during that 40 minutes meter min 40 30 20 10 5 10 15 20 25 30 35 40 minutes Page 2 WIR Math 131 copyright Joe Kahlig 07a 3 The graph shows the velocity of an object in meters sec Estimate the distance traveled between t 0 and t 6 using the methods listed below a left sum with 3 rectangles meter sec 25 20 15 10 5 1 2 3 4 5 6 7 8 sec b right sum with 3 rectangles meter sec 25 20 15 10 5 1 2 3 4 5 6 7 8 sec c right sum with 6 rectables meter sec 25 20 15 10 5 1 2 3 4 5 6 7 8 sec Page 3 WIR Math 131 copyright Joe Kahlig 07a d by counting rectangles meter sec 25 20 15 10 5 1 2 3 4 5 6 7 8 sec 4 The graph shows the velocity of an object in mph Estimate the distance traveled between t 0 and t 8 by counting rectangles mph 8 6 4 2 1 2 3 4 5 6 7 8 hour
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