The graph of the quadratic y = ax^2 + bx + c has the following properties

-b/2a = -3      and  a(-3^2) + b(-3)+c=5    and    a(0) + b*0 +c = -11     so c = -11

b/2a = 3                     9a -3b =16

a =b/6                        9 (b/6) -3b=16      b = -10.667      a =1.778

                                     

 

 

.......   m = -82.111

graph:

https://www.desmos.com/calculator/0b6334urym