Quick please help math

Ill mark the brainliest if you me with the these three questions 7,8,9

Which graph represents the parent function of y=(x+2)(x-2)

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next