Tell whether the situation represents a positive, negative, or no correlation.

The situation likely represents no correlation. The amount of time spent on the computer instant messaging friends does not inherently depend on or affect the number of computers in the house. While having more computers might allow for more time spent online, it's also possible for someone to spend a lot of time on a single computer regardless of how many are available in the household. Thus, there isn't a clear positive or negative relationship between the two variables.