TAILIEUCHUNG - Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 17

Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 17. A major complaint of professors teaching calculus is that students don't have the appropriate background to work through the calculus course successfully. This text is targeted directly at this underprepared audience. This is a single-variable (2-semester) calculus text that incorporates a conceptual re-introduction to key precalculus ideas throughout the exposition as appropriate. This is the ideal resource for those schools dealing with poorly prepared students or for schools introducing a slower paced, integrated precalculus/calculus course | Making Predictions An Intuitive Approach to Local Linearity 141 change of -1 minute day. Certainly it is ridiculous to estimate that on November 6 1998 the sun will set at 11 04 . where 5 09 . - 1 minute day 365 days 5 09 . -365 minutes 5 09 . - 6 hours 5 minutes 11 04 . time A 5 11 - 5 05 5 00 Nov. 4 10 25 15 10 25 301 5 15 Dec. Sunset time Greenwich Mean Time at 30 North Latitude. time given to the nearest minute 25 Date 1997 measured by days Figure Data from the 1998 World Almanac pp. As we can see by looking at the graph in Figure over small enough intervals the data points either lie on a line or lie close to some line that can be fitted to the data. However the line that fits the data best varies with the interval chosen. When looked at over the entire interval from November 4 to December 25 the graph does not look linear. In the last example we looked at a discrete phenomenon and made predictions based on the assumption of a constant rate of change over a small interval. In the next example we ll look at a continuous model. EXAMPLE Brian Younger is a high-caliber distance swimmer in competition he swam approximately 1 mile 36 laps of a 25-yard If he completes the first 24 laps in 12 minutes what might you expect as his time for 36 laps SOLUTION Knowing that Brian is a distance swimmer it is reasonable to assume that he does not tire much in the last third. Assuming a constant speed of 12 laps every 6 minutes or 120 yards minute we might expect him to finish 36 laps in about 18 minutes. We would feel less confident saying that he could swim 4 miles if given an hour and 12 minutes or 8 miles if given 2 hours and 24 minutes. A quantity that changes at a constant rate increases or decreases linearly. If the rate of change of height with respect to time A height A time is constant over a certain time interval then height is a linear function of time on that interval. 3These times might look suspect to you the sun .

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