College Algebra
10th Edition
ISBN: 9781337282291
Author: Ron Larson
Publisher: Cengage Learning
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Question
Chapter 6.3, Problem 69E
(a)
To determine
To calculate: The least square regression parabola
(b)
To determine
To graph: The least square regression parabola
(c)
To determine
To calculate: The stopping distance of the automobile when the speed is 75 miles per hour.
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Chapter 6 Solutions
College Algebra
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- You are the owner of Fast Break, a popular local place that sells drinks, snacks, and sandwiches. For inventory management purposes, you are examining how the weather affects the amount of hot chocolate sold in a day. You are going to gather a random sample of 7 days showing that day's high temperature (denoted by x, in °C) and the amount of hot chocolate sold that day (denoted by y, in liters). You will also note the product x.y of the temperature and amount of hot chocolate sold for each day. (These products are written in the row labeled "xy"). (a) Click on "Take Sample" to see the results for your random sample. Take Sample n: 0 x: 0 y: 0 Σχν: Π High temperature, x (in °C) Compute Amount of hot chocolate sold, y (in liters) xy 11 14 154 27 9 243 23 7 Slope (b₁): 161 Sample correlation coefficient (7): 3 y-intercept (bo): 18 54 6 11 66 Send data to calculator Based on the data from your sample, enter the indicated values in the column on the left below. Round decimal values to three…arrow_forwardWhat is the solution?arrow_forwardFAL The money raised and spent (both in millions of dollars) by all congressional campaigns for 8 recent 2-year periods are shown in the table. The equation of the regression line is y = 0.959x + 15.575. Find the coefficient of determination and interpret the result. Money raised, x Money spent, y 472.7 446.1 652.5 681.3 742.1 747.2 Find the coefficient of determination and interpret the result. 2 (Round to three decimal places as needed.) 785.7 779.4 1025.2 954.5 1207.4 1008.1 933.1 1165.1 769.1 725.3arrow_forward
- A Realtor examines the factors that influence the price of a house in Arlington, Massachusetts. He collects data on recent house sales (Price) and notes each house’s square footage (Sqft) as well as its number of bedrooms (Beds) and number of bathrooms Based on the output, what is the predicted price of a house if the square footage is 1877?arrow_forwardThe data (d) in MB used to broadcast the call-out depends on the time (t) it takes (in min) to broadcast the message. The data used by the 3 platforms are given below. Check the box(es) that correspond(s) to the platform(s) that consume data linearly. Find the maximum amount of data consumed in 2 min between these platforms. Write your answer in the boxes given below. 3 d = 22 + 8t d = 42t -18 d = (3t)(5t) Maximum data consumed %3D MBarrow_forwardPlease answer and show complete solution. Thank you!arrow_forward
- while in high school, Clayton started his T-shirt printing business. The table shows the number of T-shirts Clayton has sold each year since starting his business in 2010 year 2010 2011 2012 2013 2014 2015 2016 number of t-shirts 50 75 175 125 250 350 375 the linear regression equation representing the data shown in the table is y=57.14x + 28.57, where x represents the number of years since 2010 and y represents the number of T-shirts sold. expression unit contextual meaning mathematical meaning y 57.14 x 28.57 use the regression equation to predict the number of T-shirts Clayton sold during each given year then compare the prediction to actual number of T-shirt or determine if the prediction is reasonable based on the problem situation. 2012 2014 2016 2018 2024arrow_forwardThe statistician calculates the equation of the least regression line to be y=173 + 0.53x where y is the airfare and x is the length of the flight. a. According to this model, how much would you expect to pay for a flight from Tucson to Denver? (580 miles) b. What is the slope of the least square regression line? c. Interpret the slope of the least-squares regression line in the context of this problem.arrow_forwardSuppose the equation of the regression line for the number of emails a person recieves at a particular sales company is given by y = 11 + 12x. Where y is based on the number of accounts the person has, c. If a person has 8 accounts, find the number of emails they will recieve. Number of emails: Enter an integer or decimal number [more..] Question Help: Message instructorarrow_forward
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