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Hmwk-Linear and Exp Change WebAssign Ch 3 Hmwk-Linear and Exp Change (Homework) Current Score : – / 35 Turki Alqahtani MAT-1030, section VU01, Spring 2018 Instructor: Laura Marthaler Due : Monday, April 30 2018 08:30 AM EDT 1. –/1 pointsCraudQL2 3.1.TB.001. A function is called linear if it has a(n) _____ growth rate. varied decreasing constant increasing 2. –/1 pointsCraudQL2 3.1.TB.002. The graph of a linear function is a _____. jagged line dotted line straight line curve 3. –/1 pointsCraudQL2 3.1.TB.003. In the linear function y = mx + b, b is the _____. initial value growth rate balance slope 4. –/1 pointsCraudQL2 3.1.TB.005. Given a set of data points, the _____ line comes as close as possible to fitting those data. stabilizing regression interpretation growth http://www.webassign.net/web/Student/Assignment-Responses/last?dep=18543850 1/11 ٢٠١٨/٤/١٧ Ch 3 Hmwk-Linear and Exp Change 5. –/1 pointsCraudQL2 3.1.010. Suppose that I wrote 150 words of my English paper yesterday and today I begin typing at a rate of 60 words per minute. Is the total number of words typed a linear function of the number of minutes since I began typing today? Explain your reasoning. Yes, because the number of words typed grows constantly as the number of minutes increases. No, because the number of words typed does not grow constantly as the number of minutes increases. 6. –/1 pointsCraudQL2 3.1.014. In order to ship items I bought on eBay, I pay a delivery company a flat fee of $10, plus $2.25 per pound. Is the shipping cost a linear function of the number of pounds shipped? Explain your reasoning. Yes, because the the shipping cost grows at a constant rate. No, because the shipping cost does not grow at a constant rate. 7. –/1 pointsCraudQL2 3.1.021. Suppose that you are at the base of a hill and see a sign that reads "Elevation 3600 Feet." The road you are on goes straight up the hill to the top, which is 3 horizontal miles from the base. At the top, you see a sign that reads "Elevation 4500 Feet." What is the growth rate in your elevation with respect to horizontal distance as you drive up the road? ft/mi Use V for elevation in feet and h for horizontal distance in miles, and find a formula that gives your elevation as a linear function of your horizontal distance from the base of the hill. http://www.webassign.net/web/Student/Assignment-Responses/last?dep=18543850 2/11 ٢٠١٨/٤/١٧ Ch 3 Hmwk-Linear and Exp Change 8. –/1 pointsCraudQL2 3.1.026. Measuring the speed of sound in the ocean is an important part of marine research. One application is the study of climate change. The speed of sound depends on the temperature, salinity, and depth below the surface. For a fixed temperature of 25 degrees Celsius and salinity of 35 parts per thousand, the speed of sound is a function of the depth. At the surface, the speed of sound is 1534 meters per second. For each increase in depth by 1 kilometer, the speed of sound increases by 17 meters per second. Explain why the function expressing the speed of sound in terms of depth is linear. The change per km increase of depth is different for different depths. The sound travels in a straight line.