In 2012, the United States produced 2,068 million metric tons of CO2 from electricity alone. Let x be the amount

In 2012, the United States produced 2,068 million metric tons of CO2 from electricity alone. Let x be the amount of

CO2 produced by the United States that year from transportation. Based on the chart, what equation can be used to solve
for x? Units are in million metric tons.