Question 1056400
The linear model is
y=117.07 x+5429, when x=1 is 1997. The coefficient of determination or R is 0.989
The quadratic model is -3.261x^2+143.16667x+5389.86
When I graph that, the maximum is at 6961.21 and does not ever surpass 7000.
{{{graph(300,300,-5,30,6000,7000,-3.261x^2+143.16667x+5389.86)}}}
vertex x value is-b/2a=143.16667/6.522=21.95, and f(21.95)=6959.76
{{{graph(300,300,-5,10,4000,8000,117.07x+5429)}}}