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Functions and Relations 2
A
B
Result
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Click "Yes" if the given relation is a function; otherwise, click "No."

1. y=2x+5
Yes
No
Answer: Yes; for every x, there is exactly one y.
2. y=−x+10
Yes
No
Answer: Yes; for every x, there is exactly one y.
3. y= x+5 2
Yes
No
Answer: Yes; for every x, there is exactly one y.
4. y= 2x−3 5
Yes
No
Answer: Yes; for every x, there is exactly one y.
5. y 2 =x+1
Yes
No
Answer: No; there is an x, such as 0, that is paired with two values of y, namely, ±1.
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