<PRE><B>Question 120282</B>
The national cost C in billions of dollars for dental services can be modeled by the linear equation C(n)=2.85n +30.52 where n is the number of years since 1990. 
A)Find and interpret the C-intercept for the line:(0,30.52)
In 1990 the cost was 30.52 billion.
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B)Find and interpret the n-intercept for the line
0 = 2.85n+30.52
n = -30.52/2.85 = -10.71
The cost was zero in 1990-10.71= 1979 (rounded-off answer)
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C) Graph the line for n ranging from 0 through 20 
{{{graph(400,300,-5,25,-5,80,2.85x+30.52)}}}
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D) If this trend continues, then in what year will the cost of dental services reach 100 billion? 
100 = 2.85n+30.52
2.85n = 69.48
n = 24.38
Year = 1990+24.38 = 2015
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Cheers,
Stan H.


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