Final answer:
Inelastic goods have highly inelastic demand curves, such as life-saving drugs and gasoline, while complementary goods like gasoline and sport utility vehicles demonstrate correlated demand changes.
Explanation:
Inelastic goods are often necessities with highly inelastic demand curves, meaning a shift in price has minimal impact on consumer demand. Examples include life-saving drugs and gasoline. On the other hand, complementary goods like gasoline and sport utility vehicles show a related change in demand when prices change.
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