Question

Find the graph whose points are (1,-1) (3,-2) (2,14)

Answer 1

I think you mean "Find the equation" for the graph
that includes those points.

Here's one that works. I won't bore you with the explanation
of how I found it, because I'm pretty sure you copied the points
wrong. But this equation does go through those points:

Y = -15.5 X² + 61.5 X - 47