Suppose 2 marbles are selected at random ​(with replacement​) from a basket containing 6 blue ​marbles, 4 green​ marbles, and 3 orange marbles.
Find the probability of selecting both blue marbles.
​
P(both blue)​ =
​(Write your answer as a simplified​ fraction.)

I believe that the answer to the question provided above is that 
vertex is the max height reached.
axis of symmetry is that the graph of upward path is the opposite to that of the downward path.

shape of the graph parabolic.
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