Question 163607
Yes, you're correct for all of your answers.
Also, the min or max (depending on the sign of x^2 coefficient, positive min, negative max) is the y coordinate of the vertex.
Vertex is (3,4), x^2 coefficient is -1, 4 is the max. value. 
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{{{ graph( 300, 300, -3, 10, -10, 10,  -x^2 + 6x -5) }}}