A household's income and restaurant visits are observed at different points in time. The table below describes the pattern.
![1051_4c0fc19d-2825-4305-9f95-535c8e25b922.png](https://secure.tutorsglobe.com/CMSImages/1051_4c0fc19d-2825-4305-9f95-535c8e25b922.png)
(a) Construct a scatter diagram showing quantity on the vertical axis and income on the horizontal axis.
(b) Is there a positive or negative relationship between these variables?
(c) Compute the income elasticity for each income increase, using midpoint values.
(d) Are restaurant meals a normal or inferior good?