Write F if the following equation is a function and NF if not.
1. y=x-3
2. y²=2x+3
3. y=x²
4. x²+y=1
5. 3x²+y²=5
1. y=x-3
2. y²=2x+3
3. y=x²
4. x²+y=1
5. 3x²+y²=5
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• Use the vertical line test to determine whether or not a given represents a function. A vertical line crosses the graph more than once in any place, it's not a function because at least one input value has more than one output value.
1] F
2] NF
3] F
4] F
5] NF