To find the mean number of pets, we first need to find the sum of all the numbers represented by the x's and then divide by the total number of x's.
The numbers represented by the x's are:
0 + 1 + 1 + 1 + 1 + 2 + 2 + 3 + 3 + 3 + 3 + 3 + 3 + 4 + 9
Adding these numbers together we get:
0 + 1 + 1 + 1 + 1 + 2 + 2 + 3 + 3 + 3 + 3 + 3 + 3 + 4 + 9 = 34
There are a total of 18 x's in the line plot.
Now we can find the mean number of pets by dividing the sum by the total number of x's:
34 / 18 = 1.89
Therefore, the mean number of pets is approximately 1.89.
Among the answer choices provided, the closest option is 2.87.