Answer:
The equation is 
Step-by-step explanation:
Let the quadratic function be

The point (-4,9) must satisfy this function,


The point (0,-7) must also satisfy this function,


The point (1,-1) must also satisfy this function,


We put equation 2 into equation 1 to get;



We again put equation 2 into equation 3 to get;


We add equation 5 and 6 to get;


We put
into equation 6 to get;



The equation is therefore 