Posted by Samatha on Wednesday, January 25, 2012 at 12:46pm.
You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x.
(x = 1 is the day tickets go on sale).
Tickets = 0.6x2 + 12x + 11 .
Describe what happens to the ticket sales as time passes. My question is sinc the coefficient is negative and you graph downward the ticket sales would low? Please help

Algebra  Reiny, Wednesday, January 25, 2012 at 2:58pm
well, sort of ....
the number of ticket sales will increase until the maximum is reached, after that the ticket sales will decrease.
for any function
f(x) = ax^2 + bx + c, the max/min of the function is obtained when x = b/(2a)
in your case
x = 12/(2(.6)) = 10
when x = 10, tickets sales = .6(100) + 12(10) + 11 = 71
I will leave it up to you to show that the sales are less for both x= 9 and x=11

Algebra  samatha, Thursday, January 26, 2012 at 8:35pm
Thanks for helping me solve this problem!
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