Chapter 7

# Chapter 7 - and range. r(x) = |x| - 3 4. Determine whether...

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Chapter 7 Functions and Graphs (TEST) 1. The intensity I of light from a light bulb varies inversely as the square of the distance d from the light bulb. Suppose I is 640 w/m 2 when the distance is 3 m. How much farther would it be to a point where the intensity is 250 w/m 2 ? 2. The graph shows the annual heart attack rate per 10,000 men as a function of blood cholesterol level. Use the graph to approximate the annual heart attack rate per 10,000 men for those whose blood cholesterol level is 225 mg/dl. 3. Graph the function using a [-5,5,-5,5] window and use the graph to estimate the domain

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Unformatted text preview: and range. r(x) = |x| - 3 4. Determine whether the graph is a function. For each function, give the domain and range. 5. Electrical current. The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is ampere when the resistance is 7500 ohms. What is the current when the resistance is 2700 ohms? NOTE: Each problem worth 20 points. Be aware of UNITS. Just do the best you can, you’ll get partial credits....
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## This note was uploaded on 04/07/2010 for the course MATH 033549 taught by Professor Stockton during the Spring '10 term at Ohio Dominican.

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Chapter 7 - and range. r(x) = |x| - 3 4. Determine whether...

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