Final answer:
To show an increase in the demand for DVDs on a demand diagram after a fall in the price of DVD players, you would shift the original demand curve to the right, indicating a higher quantity demanded at each price point.
Step-by-step explanation:
If the price of DVD players falls substantially, we would expect the demand for DVDs to increase. This scenario can be represented in a demand diagram. To show the increase in demand for DVDs on a demand curve, you would shift the demand curve to the right. This rightward shift indicates that at every price level, a greater quantity of DVDs is demanded due to the reduced price of DVD players making them more accessible to consumers.
To illustrate this on a graph, first plot the initial demand curve for DVDs. Then, to represent the increased demand, draw a new demand curve to the right of the original one. At each price point on the vertical axis, the new demand curve should be at a higher quantity on the horizontal axis than the original demand curve. This shows that the quantity demanded of DVDs has increased for the same price levels, thereby reflecting the increased demand.