Exercise

Plotting subgroups in line plots

Let's continue to look at the mpg dataset. We've seen that the average miles per gallon for cars has increased over time, but how has the average horsepower for cars changed over time? And does this trend differ by country of origin?

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Use relplot() and the mpg DataFrame to create a line plot with "model_year" on the x-axis and "horsepower" on the y-axis. Turn off the confidence intervals on the plot.