The graph shows the price change, in dollars, of a toy for different levels of demand. The x-axis represents quantity (thousand units), and the y-axis represents price.

What is the average rate of change?

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The graph shows the price change, in dollars, of a toy for different levels of demand. The x-axis represents quantity (thousand units), and the y-axis represents price.

What is the average rate of change?

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The graph shows the price change, in dollars, of a toy for different levels of demand. The x-axis represents quantity (thousand units), and the y-axis represents price.

What is the average rate of change?
