Respuesta :

It will  be a parabola  withe line of symmetry = y axis and will open downwards. The coefficient of x^2 will be -1. 
As it will  have a maximum and y intercept of  y = 4 the function will be

f(x) = -x^2 + 4
920610

Answer:

-x^2+2x+4

Step-by-step explanation:

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