FIGURE 2-3 Refer to Figure 2-3

question 119

Multiple Choice

FIGURE 2-3 Refer to Figure 2-3.The slope of curve B is

• A)zero at X₂.
• B)always negative but variable.
• C)always positive but variable.
• D)undefined at X₂.
• E)positive from Y₁ to Y₂ and negative between Y₂ and Y₃.

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