The diagram below shows the equilibrium price and quantity of commodity A which is produced jointly with commodity B.
do do-demand curve
so so - supply curve
PE -Equilibrium point
QE -Equilibrium quantity
![diagram on equilibrium price and quantity of commodity](https://www.easyelimu.com/images/form_3_past_papers/Term_1_2021/diagram_on_equilibrium_price_and_quantity_of_commodity.PNG)
- On the diagram show the effect of a decrease of tax charged on commodity B on the equi8librium price and quantity of commodity A
- Explain the effect of a decrease of tax charged on commodity B on the equilibrium price and quantity of commodity A