anonymous
  • anonymous
Determine whether the formula describes Y as a function of X: y=9x+1
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
I don't understand?
anonymous
  • anonymous
if every (x) has 1 (y) then (y) is a function of (x)

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anonymous
  • anonymous
now if every (x) has 2 (y) s then (y) is not a function of (x) (x) is a function of (y)
anonymous
  • anonymous
|dw:1356561453642:dw|
anonymous
  • anonymous
|dw:1356561580944:dw|
anonymous
  • anonymous
did u get it @larrissia
anonymous
  • anonymous
S0fw0N is waiting for you to give the real answer. So he/she just explained how it works!
anonymous
  • anonymous
You need to see if the formula is injective.
anonymous
  • anonymous
(if you plot the function, there must be just one y for each x, but there can be two or more x for an y value)
anonymous
  • anonymous
in plain english, for any ONE x value, will you have only ONE y value?
anonymous
  • anonymous
Yes for example if at (2,4). The point (2,7) would not make it a function because it does not pass the vertical line test.

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