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# Fuel Economy

## Are hybrid cars worth the extra cost?

Are hybrid cars worth the extra cost? Many vehicles are available with both standard gas-powered engines or hybrids. While the hybrid models require less gas and are better for the environment, they may initially cost thousands of dollars more.

In this lesson, students use linear equations to compare the costs of driving a car with a standard engine versus a hybrid engine and debate whether new buyers should always go green

### REAL WORLD TAKEAWAYS

• Hybrid cards use an electric motor at slower speeds which burns less fuel, causing less air pollution, than a gas powered one.
• Hybrids cars typically cost more up front than their standard versions but require buying less gas to travel the same distance.
• Which car is a better deal depends on how much one drives, how those miles are divided over the city and highway, and how long they plan to keep the car.

### MATH OBJECTIVES

• Write and solve equations to solve real-world questions
• Compare proportional relationships represented in different forms including: tables, graphs, and equations

Appropriate most times as students are developing conceptual understanding.