Will anyone catch me up reward is 20

Question 6 (10 points) ✓ saved what is the center of a circle described by the equation x2 + y2 +10y = -16? . (0,-5) (0,5) (-5,0) (5,0)

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Can someone answer this question for me