Question 380367
a) It opens up because the x^2 coefficient is positive.
b) {{{lim(x->infinity, x^2 - 6x - 16) = infinity}}}, so more and more tickets will be sold.
c) d) e) f) These parts don't make any sense. Apparently the function yields negative ticket sales from x = 0 to x = 6.
g) The vertex occurs at x = -b/2a = 3. f(3) = -25 so the vertex is (3,-25).
h) Two solutions (by the fundamental theorem of algebra). Solutions are -2 and 8 by factoring or the quadratic formula.
i) Well...-2 makes no sense since we're assuming it starts at day 0.

This seems like a poorly written problem. Is the quadratic equation the correct one?