in 2 1/4 hours nick wrote 36 text messages what was his unit rate during that time?

14 messages per hour
16 messages per hour
34 messages per hour
81 messages per hour

To find the unit rate, divide the number of text messages by the number of hours:

36 messages / 2.25 hours = 16 messages per hour

So, the unit rate is 16 messages per hour.