Final answer:
Using a proportion based on Alexandra's text rate, we find that at 16 words per minute, it would take her 8 minutes to text 128 words.
Step-by-step explanation:
Alexandra can text 96 words in 6 minutes. To find how many minutes it would take her to text 128 words, we can set up a proportion because the rate at which she texts is constant.
Step 1: Calculate the words per minute.
96 words / 6 minutes = 16 words per minute
Step 2: Use the words per minute to find the time for 128 words.
128 words / 16 words per minute = 8 minutes
Therefore, at this rate, it would take Alexandra 8 minutes to text 128 words. The correct answer is a) 8 minutes.