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Concentration of CO2 in the Atmosphere Levels of carbon dioxide (CO2) in the atmosphere are rising rapidly, far above any levels ever before recorded. Levels were around 278 parts per million in 1800, before the Industrial Age, and had never, in the hundreds of thousands of years before that, gone above 300 ppm. Levels are now over 400 ppm. The table below shows the rapid rise of CO2 concentrations over the 55 years from 1960-2015, also available in Carbon Dioxide. We can use this information to predict CO2 levels in different years. Year CO2 1960 316.91 1965 320.04 1970 325.68 1975 331.11 1980 338.75 1985 346.12 1990 354.39 1995 360.82 2000 369.55 2005 379.80 2010 389.90 2015 400.83

Your answer is partially correct. (c) Use technology to calculate the regression line to predict CO2 from year. Round your answer for the intercept to one decimal place and your answer for the slope to three decimal places. CO2 = -2571 + 1.5369 (Year) e Textbook and Media Hint

Your answer is partially correct. (e) What is the intercept of the line? Round your answer to one decimal place. The intercept is i -2571 Does it make sense in context? No eTextbook and Media Hint

X Incorrect. (f) Use the regression line to predict the CO2 level in 2003. Use rounded slope and the intercept from part (c), then round your answer to one decimal place. CO2 level in 2003 = i 373.41 Use the regression line to predict the CO2 level in 2025. Use rounded slope and the intercept from part (c), then round your answer to one decimal place. CO2 level in 2025 = i 398.40 e Textbook and Media Hint

X Incorrect. (g) Find the residual for 2010. Use rounded slope and the intercept from part (c), then round your answer to two decimal places. Residual for 2010 = i 6.08 e Textbook and Media Hint Save for later Attempts: 2 of 3 used Submit Answer