Which graph best represents the number of people in attendance throughout the evening?

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

Polynomial that can be factored as (3x-4)(3x+4)

Yo need asap pls ! markin da brainiest too !