SOLUTION: Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions

Question 308749: Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reasoning for a, b, and c.
a. f(x) = x + 3
b. f(x) = 73 if x>2 otherwise f(x) = -1
c. f(x) = 79if x>0 or f(x) = -9 if x<0 or f(x) = 9 or -9 if x = 0

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
The first two are functions.
For each value of x, you get a unique value of y.
.
.
.
However for the third one,
or if fails the uniqueness test.
Therefore it's not a function.
RELATED QUESTIONS
Which of the following are functions? The last two problems, i.e., b & c, are multi part (answered by solver91311)

Which of the following are functions? The last two problems are multi part relations... (answered by stanbon)

1. Which of the following are functions? The last two problems, i.e., b & c, are multi... (answered by stanbon)

This is probably so basic but it's been a VERY long time and it just doesn't make sense... (answered by gonzo)

7. Which of the following are functions? Explain your reasoning for a, b, and c. Keep... (answered by stanbon)

Which of the following are functions? Explain your reasoning for a, b, and c. Keep the... (answered by stanbon)

Which of the following relations are functions? I. X 2,0,0,2 Y0,1,4,9 II. X 0,1,4,9 (answered by richard1234)

Which of the following statements are true about functions and relations? No... (answered by ikleyn)