If she typed 84 words in two minutes, and you must find how many words she types at 1 minutes, 3 minutes, and 9 minutes is she was consistent in her speed, all you have to do is find the WPM (words per minute), and then multiply. Since we start with her WPTM (words per two minutes), we simply divide that by two.
84/2=42
So, our WPM rate is 42.
So, she types 42 words in one minute.
42*3=126
She types 126 words in three minutes.
42*9=378
She types 378 words in nine minutes.