Describe whether each of the following is linear or not linear. In each case, explain your answer.
A. 3x+4y+2=0
B. X= 2,4,6,8 Y=1,5,15,30
C. You have a secret that you tell to one person. Every hour, each of the people that know the secret tells one person. The number of people who know is N, and t is the number of hours since you told the first person. Is N a linear function of t?

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C. N is not a linear function of t because N does not change by a constant amount as t changes.

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