anonymous
  • anonymous
Which of the following expressions represents a function? y = x2 {(9, 2), (4, –2), (5, 3), (9, –4)} x = –3 x2 = 25 − y2
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
what about the first one would the graph of x^2 pass the vertical line test?
anonymous
  • anonymous
no?
welshfella
  • welshfella
|dw:1441298694530:dw|

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More answers

anonymous
  • anonymous
so yes
welshfella
  • welshfella
|dw:1441298735710:dw|
anonymous
  • anonymous
yea
welshfella
  • welshfella
right so y=x^2 is a function
anonymous
  • anonymous
so thats the answer
welshfella
  • welshfella
what about the second one? well there might be more than one....
anonymous
  • anonymous
its not the 2 one i know that for fact
anonymous
  • anonymous
cuz i got it wrong before
welshfella
  • welshfella
right and x = -3 in not a function because it is a vertical line
anonymous
  • anonymous
the 3 one idk
anonymous
  • anonymous
and the 4 one no
welshfella
  • welshfella
the second is not a function as it has duplicate x values ( the 9's)
anonymous
  • anonymous
yea
welshfella
  • welshfella
right
anonymous
  • anonymous
its A correct
welshfella
  • welshfella
A is the one
anonymous
  • anonymous
after this can i ask another question?
anonymous
  • anonymous
Which of the following expressions is the inverse of the function y = 3x + 4? y = 3x − 4 y = –3x − 4 y equals quantity x minus 4 divided by 3 y equals quantity x plus 4 divided by 3
welshfella
  • welshfella
well i only have 5 minutes but go ahead.
welshfella
  • welshfella
first find x in terms of y y = 3x + 4 3x = y - 4 x = (y-4)/3 replace x by f(-1)x ( which means the inverse of the function) and y by x so we get ( x - 4) / 3
welshfella
  • welshfella
thats it
anonymous
  • anonymous
so C correct
welshfella
  • welshfella
yea
anonymous
  • anonymous
thx man

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