The 9 times table lists the multiples of 9: 9 × 1 = 9, 9 × 2 = 18, … 9 × 12 = 108. "9x" usually refers to this multiplication table.
"9x" can mean 9 times a variable, but most people searching it want the 9 times table: 9 × 1 = 9, 9 × 2 = 18, … 9 × 12 = 108.
Learn the multiples of 9 from 9 × 1 = 9 up to 9 × 12 = 108. Count up by 9 each time, or drill yourself with the table above.