(Solution) - Table 6 lists U S fossil fuel consumption as a percentage -(2025 Original AI-Free Solution)

Paper Details

Table 6 lists U.S. fossil fuel consumption as a percentage of total energy consumption for selected years. A linear regression model for this data is
y = -0.06x + 85.6
where x represents years since 1985 and y represents the corresponding percentage of fossil fuel consumption.

(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 consumption in 2020.
(D) Use the model to estimate the first year for which fossil fuel consumption is less than 80% of total energy consumption.