The demand for a commodity has unitary price elasticity. Which diagram illustrates how total expenditure on the commodity is related to its price?
- A[IMAGE:9708_w14_qp_12_p5_diagram_7]
- B[IMAGE:9708_w14_qp_12_p5_diagram_6]
- C[IMAGE:9708_w14_qp_12_p5_diagram_5]
- D[IMAGE:9708_w14_qp_12_p5_diagram_4]