Tourism Spending The equation
y = 1.69x2 − 0.92x + 324.10,
with x equal to the number of years after 1998, models the global spending (in billions of dollars) on travel and tourism from 1998 to 2009.
a. Graph this function for x = 0 to x = 20.
b. If x = 0 in 1998, find the spending projected by this model for 2015.
c. Is the value in part (b) an interpolation or an extrapolation?
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