6. A mobile phone company offers a phone plan that allows 600 min of airtime per month. The revenuegenerated from this plan depends on the price of the plan according to the data in the table.20253035Monthly Plan Price (S)Revenue ($1000s)1015118015601740172015001080Use technology to determine the model that best models this data.c. y= -4x2 + 1553.3a. y=-4x + 176óx – 180b. y= 4x - 176x + 180d. y= 4x- 1553.3Page 2 of 4

A quadratic function is defined using the equation: y=ax2+bx+c. The regression analysis is done to…

Answered: A mobile phone company offers a phone…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A mechanic's labor charge for working a given number of hours is displayed in the table shown. Hours Worked, h Labor Charge, c(in dollars) 1 89 2 149 3 209 4 269 Which equation represents the relationship between the hours worked and the mechanic's labor charge? A.c = 49.5h + 50 B.c = 45h + 44 C.c = 60h + 29 D.c = 29h + 60
The table describes the height of a weather balloon, in meters, minutes after its launch. Time (minutes) Height (meters) 0 60 1 68.2 2 74.3 3 80.9 4 89.7 8 128.5 Select which equation best models the data. O O O O y = 8.52 +58 y = 8.2x + 60 y = 11.4x +57 y = 11.8x + 54
How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms). x 3 6 12 20 26 y 60 95 140 160 189 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. Flash Player version 10 or higher is required for this question. You can get Flash Player free from Adobe's website. (b) Would you say the correlation is low, moderate, or strong? low moderate strong Would you say the correlation is positive or negative? positive negative (c) Use a calculator to verify that x = 67, x2 = 1265, y = 644, y2 = 93,546, and xy = 10,544. Compute r. (Round your answer to three decimal places.) As x increases from 3 to 26 months, does the value of r imply that y should tend to increase or decrease? Explain your answer. Given our value of r, y should…
The number of calories in a food item depends on many factors, including the amount of fat in the item. The data below shows the amount of fat (in grams) and the number of calories in 7 beef sandwiches at McDonalds. The scatterplot displaying the relationship is shown to the right. Collection 1 Scatter Plot Sandwich Fat Calories 800- Big Mac Quarter Pounder w/ Cheese Dbl Quarter Pounder w/ Cheese Hamburger Cheeseburger Double Cheeseburger 29 550 600- 26 520 42 750 400- 9. 250 200- 12 300 23 440 McDouble 19 390 10 15 20 25 30 35 40 45 Fat 1. Describe the shape, the direction, and the strength of this relationship. 2. The regression equation for this data is Calories 1.52 Fat + 105. Explain the meaning of the slope and y-intercept in the context of this problem. 3. What is the correlation between Calories and Fat? 4. What number of calories does the regression model predict if a sandwich has 36 grams of fat? Remember to include units. B I U A Ix E E E x X, = E 12pt Paragraph Calories 囲

Some pedometers have a default setting that assumes that the number of steps a person must take to walk 1 mile decreases by 32 steps per 1 inch increase in height. Suppose a person 72 inches tall makes 2,250 steps per mile. Find a linear model of the number of steps S per mile as a function of height h (in inches). S = Use the model to predict the number of steps per mile a person who is 64 inches tall will take. steps per mile
In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushes per acre). Calculate the linear coefficient. Rainfall (in inches), x 9.4 7.7 12.3 11.4 17.7 9.2 5.9 14.5 14.9 Yield (bushels per acre), y 46.5 42.2 54.8 55 78.4 45.2 27.9 72 74.8 Answer choices are: A. 0.900 B. 0.981 C. 0.899 D. 0.998

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