MATH 225N Statistics Correlation and Y-intercepts Quiz 2020 | MATH225N Stat correlation and Y-intercepts Quiz_A Grade

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MATH 225N Stat correlation and Y-intercepts Quiz 2020 – Chamberlain College of Nursing Question A plot of time versus the price of a best-selling model of television has horizontal units of year... s since 2000 and vertical units of dollars. The best fit line of the data are defined by the equation y=−75x+550, where x=year and y=price. What are the units of the slope? Perfect. Your hard work is paying off ? year dollars dollars per year years per dollar television model Answer ExplanationCorrect answer: dollars per year The slope of the best fit line has units of dollars per year because the line represents the number of dollars the price drops each year. The price decreases as opposed to increases because the slope is negative. Question Which of the following data sets or plots could have a regression line with a negative yintercept? Select all that apply. Great work! That's correct. • the percent change in the land area in the arctic circle covered by ice as a function of the tons of CO2 produced by humans • • the change in the square mileage in the arctic circle covered by ice as a function of the tons of CO2 produced by humans • • the number of people living on a volcanic island as a function of the number of days since the last volcanic eruption •• the difference in the number of ships launched by competing ship builders as a function of the number of months since the start of last year • Answer Explanation Correct answer: the percent change in the land area in the arctic circle covered by ice as a function of the tons of CO2 produced by humans - - - - - - - Continued [Show More]

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