Question 341098
C= 2.85n + 30.52 
a. find and interpret the C-intercept for the line
At the C-int, n=0 (the interpretation)
C = 30.52
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b. find and interpret the n-intercept for the line
At the n-int, C = 0
0 = 2.85n + 30.52
n = -30.52/2.85
n =~ -10.7088
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c. graph the line for n ranging from 0 thru 20 
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The C-intercept is the point (0,30.52)
At n = 10, C = 2.85*20 + 30.52 = 87.52
A 2nd point is (20,87.52)
It's a straight line, 2 points is sufficient to plot it.