To estimate the median from a dot plot, first count the total number of data points (dots). Then, if the total number of data points is odd, the median is the middle number. If it is even, the median is the average of the two middle numbers.
The specific number of dots needs to be visible to apply those rules to find the median. If you can provide that information or describe the distribution of the dots on the plot, I can help you calculate the median.