ANSWER
Step-by-step explanation
We have that the graphs passes through the points (-4, 0) and (1, 0).
If you notice the value of y in the two points is 0. This means that those two points are the roots of the equation of the graph.
They lie on the x axis.
So, we can write that:
x = -4 and x = 1
=> x + 4 = 0 and x - 1 = 0
=> (x + 4)(x - 1) = 0
The fact that the equation has a minimum value at its vertex confirms that the coefficient of x^2 is positive.