2014 Chevy Spark EV
GM
2014 Chevy Spark EV

Sales of the Nissan Leaf and other electric cars have dipped thus far in 2015, and automakers have resorted to price cuts to boost interest in plug-ins.

How does the price of gas correlate to electric car sales? One might reasonably assume that the higher gas prices go, the more likely battery-powered vehicles are to appeal to the masses. When gas prices are cheap, on the other hand, interest in electric cars would tend to fade, as the difference in the cost of charging versus fueling up shrinks.