Solve the problem.Suppose that y is inversely proportional to x and that y = 40 when x = 9. Find the constant of proportionality k. Then use y = 
to find y when x = 8.
A. k = 180; y = 22.5
B. k = 360; y = 45
C. k = 72; y = 9
D. k = 
; y = 
Answer: B
Mathematics
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