Aportion of the graph of f(x) = −x2 − 2x + 8 is shown. which of the following describes all solutions for f(x)?
a partial parabola opening down and passing through negative 4 comma 0 and 2 comma zero with endpoints at negative 5 comma negative 7 and 3 comma negative 7
a). (x, −x2 − 2x + 8), where −5 ≤ x ≤ 3
b). (x, y), where −4 ≤ x ≤ 2
c). (x, −x2 − 2x + 8), where −4 ≤ x ≤ 2
d). (x, y) for all real numbers