8. Chapter Problem Research results for a
concert show that 10 000 people will attend
the concert if the price is $20 per ticket. For
each dollar increase in price, 1000 fewer
people will attend. The function that models
the revenue of the concert is:
R(x) = (10 000 - 1000x)(20 + x), where x
represents the dollar increase in ticket price.
a) Expand the function. Is it quadratic?
b) Use Technology Graph the function
using a graphing calculator. Is the graph
a parabola?
b)
c)