各位大虾好！！
我是新来的，目前有一个微观经济学的问题比较头疼。
请大家帮忙用原理叙述一下解题的过程！
多谢了！！着急！！

The price-quantity data in the following table will graph a straight line demand curve. Use both the elasticity measure and the total revenue curve to determine the elasticity of demand for each price change. What can you conclude about the relationship between the slope of the demand curve and its elasticity? Answer the question using both numerical and graphical methods.

Product Price ($)	Quantity Demanded	Total Revenue ($)
7	0
6	1
5	2
4	3
3	4
2	5
1	6