My original explanation focused on the theoretical reasoning behind why price elasticity of demand (PED) varies along a straight-line demand curve. But there’s another compelling way to see this—by plugging actual numbers into the formula and calculating the PED directly. When you compare the results, it becomes strikingly clear how this seemingly uniform slope harbors such nuanced changes. Both approaches lead to the same conclusion, yet together, they bring this economic concept vividly to life.
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