The table of equivalent ratios would have the following details; The months, books, and ratio.
How to fill out the table
The ratio 4:1 represents Lillian reading 4 books per month. The following is a table that shows the ratio of books/months as 12/3 or 4/1.
Months (x) Books (y) Ratio (y/x)
1 4 4:1
3 12 4:3
9 36 4:9
So, we can see that the ratios are aligned with the way that Lilian's reading of books increased over time. Below is a plot that shows the increase and the ratios.