This when I in economic class and what I do in class.
The graph show the Demand change or shift. The thing that make the graph shift out is Taste/preference. The graph of Demand rice is shift out. The reason that make the graph of Demand shift rice out because the people they need more.They need more food the reason is they hard to grow.The first equilibrium point when it $6 they can sale 135 Kg. The second equilibrium point the price of supply increase to $7 and the quantity of rice increase to 155 Kg.
The link of the graph