Which is an equation of the graph shown in the diagram? Pls help will mark brainliest. :)

Answer:
B
Step-by-step explanation:
The graph is symmetrical about the y- axis thus has equation
y = ax² + c ( c is the y- intercept )
Here c = 4 and
y = ax² + 4
Since the graph has a maximum and opens down the a < 1
y = - x² + 4 → B