yep (-2,1) was the minimum point for the last question. you needed it for the last question to work out K btw that's was 5
22 root 2 was also right
(0,3) was right and so is (0,7). you worked it out by putting x and y equal to 0 separately to find X and Y respectively.
question 12(i) required you to find K by putting the quadratic equal to Zero. and solving to find K