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Graphs of Functions 1
A
B
C
Result
. . . .

Determine whether or not each of the given relations is a function. Choose your answer.

1. y=x−5
A function
Not a function
Answer: A function
2. y=x+7
A function
Not a function
Answer: A function
3. y= x 2 −9
A function
Not a function
Answer: A function
4. y= x 2 +1
A function
Not a function
Answer: A function
5. y 2 =x+2
A function
Not a function
Answer: Not a function
6. y 2 =x−4
A function
Not a function
Answer: Not a function
7. y= 1 x
A function
Not a function
Answer: A function
8. y= 1 x +3
A function
Not a function
Answer: A function
9. y= x 2 4
A function
Not a function
Answer: A function
10. y= x 2 9
A function
Not a function
Answer: A function
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