Can someone please help me plot this and tell me if it’s an open or closed circle

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.

Which expression gives you the distance between the points (5,1)and(9,-6)