Answer :
From the table of number of rows and number of flowers is given.
To examine the relationship between the number of rows and flowers,
r is denoted as number of rows .
f is denoted as number of flowers.
From the first coordinate, the number of flowers is 4 times the number of rows.
Similarly in second coordinate, the number of flowers is 4 times the number of rows.
Example,
[tex]f=4r[/tex]Substitute the first coordinates to check.
[tex]f=4\times2[/tex][tex]f=8.[/tex]which satisfy the value of flowers.
Hence , the correct option is D which is,
[tex]f=4r[/tex]