Question 347077
Which of the following are functions? Explain your reasoning for a, b, and c. Keep the definition of a function strongly in mind as you do this problem, it is not nearly as difficult as it may look. Think about whether the relationship between f(x) and x is consistent with being a function or not and explain your reasoning. Problems b & c are multi part relations so consider all parts when deteriming if they are funcitons.
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Fact: f is a function if for each x value there is only one f(x) value.
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a. f(x) = x^8 ::::::yes
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b. f(x) = 45 if x>2 otherwise f(x) = -4::::yes
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c. f(x) = 4 if x>0 
or f(x) = -4 if x<0 
or f(x) = 4 or -4 if x = 0 
No, because f(0) is 4 or -4
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Cheers,
Stan H.
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