because if it says <u>at least</u> 53 people buy food from the food truck that means it could be 53 people or more.
Now for the graph it will be the one with the closed circle and the arrow pointing to the right.
The line is supposed to resemble how many people buy food from the food truck.
So the meaning of the closed circle is that the 53 is included within the possiblities and the arrow would show how much could be there since it said at least 53 people so there could be more.