e bar graph gives the average global temperature for eight selected years. a. Estimate the yearly increase in the average global temperature, rounded to the nearest hundredth of a degree. b. Write a mathematical model that estimates the average global temperature, T, in degrees Fahrenheit, x years after 1950. c. If the trend shown by the data continues, use your mathematical model from part (b) to project the average global temperature in 2020. A bar graph titled "Average Global Temperature" has a horizontal axis and a vertical axis labeled "degrees Fahrenheit" from 56 to 59 in increments of 0.5. There are vertical bars, each of which is over a horizontal axis label. The heights of the bars are as follows, where the horizontal axis label is listed first and the height is listed second: 1950, 56.94; 1960, 57.01; 1970, 57.04; 1980, 57.09; 1990, 57.62; 2000, 57.69; 2010, 58.07; 2015, 58.26. Each bar is labeled with its height. Average Global Temperature 1950 1960 1970 1980 1990 2000 2010 2015 56 57 58 59 degrees Fahrenheit 56.94 57.01 57.04 57.09 57.62 57.69 58.07 58.26 Question content area bottom Part 1 a. The yearly increase in the average global temperature is approximately 59degreesF per year. (Round to the nearest hundredth as needed.)