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Barrelracing

  • one year ago

Which of the following expressions represents a function? a) x=1 b) {(3,2),(3,-2),(4,5),(4,-5) c) y=4x-1 d) 4x^2 + y^2 = 16

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  1. anonymous
    • one year ago
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    function meaning graph?

  2. Barrelracing
    • one year ago
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    not exactly sure

  3. anonymous
    • one year ago
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    a c d are graphs.b is coordinates

  4. anonymous
    • one year ago
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    By the way you look like Kim Kardashian in the photo

  5. Haseeb96
    • one year ago
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    what do you think which one is correct ?

  6. Barrelracing
    • one year ago
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    @jim_thompson5910 im not sure about any of this

  7. anonymous
    • one year ago
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    C, because a function by definition is one where the there is only 1 solution (y value) for an x coordinate. x=1 is a 1 to many, d is many to many, and b is a list i think.

  8. Haseeb96
    • one year ago
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    f(x) = x^2 +1 where y=f(x) this type of equation is called function now guess what is the correct answer

  9. Haseeb96
    • one year ago
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    @Barrelracing tell me ?

  10. Barrelracing
    • one year ago
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    c

  11. Haseeb96
    • one year ago
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    yes correct

  12. jim_thompson5910
    • one year ago
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    Let's go through the choices a) x=1 this is NOT a function because it plots a vertical line. All vertical lines are NOT functions. ------------------------------------------------------- b) {(3,2),(3,-2),(4,5),(4,-5) This is NOT a function either. The points (3,2) and (3,-2) violate the vertical line test. ------------------------------------------------------- c) y=4x-1 This is a function because each x value plugged in produces exactly one y value. The graph passes the vertical line test because any given vertical line only passes through exactly 1 point. ------------------------------------------------------- d) 4x^2 + y^2 = 16 This makes a circle. It is possible to draw a vertical line through more than one point on this circle. So it fails the vertical line test and it is NOT a function.

  13. anonymous
    • one year ago
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    Well technically d is an elipse...

  14. jim_thompson5910
    • one year ago
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    oh right, my bad

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