About a 50% chance you'll roll doubles after 6 tries, based on Mr. Jones's class data.
Based on the image, the probability of needing more than 6 rolls to get doubles is around 50%. We can estimate this by looking at the rightmost section of the dot plot, which shows the number of rolls that took 7 or more rolls. There are about 13 dots in this section, which is about half of the total number of dots in the plot.
It is important to note that this is just an estimate, as the data in the dot plot is not evenly distributed. There are more dots in the middle of the plot, which suggests that most students rolled doubles in 4 or 5 rolls. However, there is still a significant number of students who took 7 or more rolls, which is why the probability of needing more than 6 rolls is still around 50%.