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x1xofxaxkndx

  • 3 years ago

Which of these equations represent functions? Check all that apply. A. y = x2 B. y = 3x C. x2 - y2 = 1 D. y2 = x2

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  1. x1xofxaxkndx
    • 3 years ago
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    i think a and c

  2. mathstudent55
    • 3 years ago
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    a & b

  3. x1xofxaxkndx
    • 3 years ago
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    thanks loli got 1 right

  4. mathstudent55
    • 3 years ago
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    c & d are not functions.

  5. x1xofxaxkndx
    • 3 years ago
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    |dw:1357706214919:dw|

  6. mathstudent55
    • 3 years ago
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    yes

  7. mathstudent55
    • 3 years ago
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    @ankolix A function is a realtion that maps each element of its domain to a single element of its range. A parabola that opens up or down is a function. A parabola that opens right or left is not a function.

  8. mathstudent55
    • 3 years ago
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    |dw:1357706562084:dw|

  9. mathstudent55
    • 3 years ago
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    An easy way to tell if a relation is a function from a graph is the vertical line test. Think of a vertical line moving from left to right on the graph. If in any position, the vertical line intersects more than one point of the relation, then the relation is not a function.

  10. x1xofxaxkndx
    • 3 years ago
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    thanks sooooooo much for the help!!!!!!!!!!

  11. mathstudent55
    • 3 years ago
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    You're very welcome.

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