he 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.