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Which of the following are functions?
1. y= -3/2x
2. x= 2y - 5
3. x^2 + y^2 = 16

User Nzhenry
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1 Answer

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1. Yes. This is the equation of a lihe.

2. Yes. See 1.

3. No. This is the equation of a circle, which fails the vertical line test.

User Chaitannya
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