exam Maths Puzzle Numerical Ability

Identify whether the parabola y=-(x-3)^2 +6 opens up or down and identify the vertex, x-intercepts and y-intercepts. I know it opens down but, I am not sure how to identify the intercepts or vertex (3,6)?

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exam Other Question
the quadrilateral with vertices P(6,3), Q(2,-2), R(1,7) and S(x,y) is a parallelogram. Find (x,y) algebraically. The sum of three consecutive odd numbers is more than 375. Find the minimum values of these integers.