26. Lots of Highways The number of kilometers of U.S. urban roadways (millions of kilometers)

for the years 2000–2015 is reported here.9 The years are simplified as years 0 through 15.

a. Draw a scatterplot of the number of kilometers of roadways in the United States over time. Describe the pattern that you see.

b. Find the least-squares line describing these data and plot the line on the scatterplot. Is there anything unusual about the way that the line fits the data points?

Transcribed Image Text:

Kilometers of Roadways 1.36 1.41 1.42 1.50 1.57 1.62 1.65 1.66 (millions) Year-2000 1 2 3 4 5 6 7 Kilometers of Roadways 1.71 1.73 1.74 1.76 1.78 1.89 1.92 1.94 (millions) Year-2000 8 9 10 11 12 13 14 15