SOLUTION: Which of the following is/are not functions? Why?
a. y = square root of (x^2 - 9)
b. x^2 + 3x + 2y + 5 = 0
c. 2x^2 - y^2 + 3x - 6 = 0
d. y = 2x^2 - 5
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Functions
-> SOLUTION: Which of the following is/are not functions? Why?
a. y = square root of (x^2 - 9)
b. x^2 + 3x + 2y + 5 = 0
c. 2x^2 - y^2 + 3x - 6 = 0
d. y = 2x^2 - 5
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Question 252378: Which of the following is/are not functions? Why?
a. y = square root of (x^2 - 9)
b. x^2 + 3x + 2y + 5 = 0
c. 2x^2 - y^2 + 3x - 6 = 0
d. y = 2x^2 - 5 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Which of the following is/are not functions? Why?
a. y = square root of (x^2 - 9)
Is:
b. x^2 + 3x + 2y + 5 = 0
Is: It's a parabola opening downward
c. 2x^2 - y^2 + 3x - 6 = 0
Is not: It's a hyperbola.
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d. y = 2x^2 - 5
Is: It's a parabola opening upward.
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Cheers,
Stan H.
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