Energy production. Table 5 lists US. fossil fuel production as a percentage of total...

Energy production. Table 5 lists US. fossil fuel production as a percentage of total energy production for selected years. A linear regression model for this data is

y = -0.3x + 84.6

where x represents years since 1985 and y represents the corresponding percentage of total energy production.

(A) Draw a scatter plot of the data and a graph of the model on the same axes.

(B) Interpret the slope of the model.

(C) Use the model to predict fossil fuel production in 2020.

(D) Use the model to estimate the first year for which fossil fuel production is less than 70% of total energy production.