PLZ HELP I WILL GIVE BRAINLIEST

Answer:
5
Step-by-step explanation:
The maximum value of the function represented by the red graph is 4.
The other function is also a parabola whose vertex is at (-3, -1), The value of this function at x = -3 is -1.
Thus, the difference between the two maxima is 4 - (-1) = 5