Global warming.Have average global temperatures been increasing in recent years?

Here are annual average global temperatures for the last 20 years in degrees Celsius.

(a) Find the least-squares regression line for predicting average global temperature from year.

Temperature =(0.01) + (0.0001)YearYear

(b) An environmentalist uses the line, based on the 20 years, to predict average global temperatures in 2050. What is the prediction?

Temperature (0.01) = C