There has been rumours that the government is developing a secret plan to tax mango producers. The tax twill be in $ per kilo of mangoes. A whistle blower has stolen the diagram shown in Figure 1. The variable P is measured in $ per kilo of mangoes and the variable Q is measured in kilos of mangoes per hour.

P 50 QD = 100 - 2xP 40 30 23 QS = 3xP 20 18 10 5 Q 0 20 40 54 60 80 100