To describe a pattern of 9th row of the multiplication table:
Multiples of 9 have a pattern of 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 in the ones place. As the ones digit decreases by 1, the tens digit increases by 1.
The table is,
[tex]\begin{gathered} 1\times9=9 \\ 2\times9=18 \\ 3\times9=27 \\ 4\times9=36 \\ 5\times9=45 \\ 6\times9=54 \\ 7\times9=63 \\ 8\times9=72 \\ 9\times9=81 \\ 10\times9=90 \end{gathered}[/tex]