Hybrid vehicles were a notion that environmentalists spoke about as a concept, which could increase gas mileage of vehicles, and conserve consumption of fossil fuels. According to Wikipedia, "Today's hybrid cars or hybrid electric vehicles are automobiles powered by internal combustion engines, but also equipped with batteries recharged during driving and an electric motor to assist with power demand" (2005). "'Hybrids do not necessarily have to be plugged in, yet still deliver superior mileage and are …
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…linear relationship between two variables. Our equation is: Y'= -161121 + 128944X. Reference: Wikipedia. (March, 2005). Hybrid Cars. Retrieved on March 31, 2005, from http://en.wikipedia.org/wiki/Hybrid_vehicle Business Statistics Douglas A. Lind, William G. Marchal, Robert D. Mason, & Donald R. Cooper Irwin/McGraw-Hill, 2003 Burr Ridge, IL Department of Energy. (February 2005). Motor Gasoline Retail Prices, U.S. City Average. Retrieved on March, 21, 2005, from http://www.eia.doe.gov/emeu/mer/pdf/pages/sec9_6.pdf