ƒ(0) = 0, and ƒ'(−2) = f'(1) = ƒ'(9) = 0 ● lim f(x) = 0 and lim f(x) x →∞ x→6 • f'(x) < 0 on (-∞, −2), (1,6), and (9, ∞) • f'(x) > 0 on (-2, 1) and (6,9) • ƒ"(x) > 0 on (-∞,0) and (12, ∞) • ƒ"(x) < 0 on (0,6) and (6, 12) = -∞

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Q: 2. Is every relation a function? Explain why or why not?

A: Topic = Functions