odettecruz
odettecruz odettecruz
  • 02-02-2016
  • Mathematics
contestada

If (-3, y) lies on the graph of y = 3^-x, then y =

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Leader
Leader Leader
  • 02-02-2016
Simply plug in x= -3 in to y = 3^-x, and solve for y.

[tex]y=3^{-(-3)}\\\\y = 3^3\\\\\boxed{\bf{y=27}}[/tex]

So, the point (-3, 27) lies on the graph of y = 3^-x.

Your final answer is y = 27.
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Kytten
Kytten Kytten
  • 02-02-2016
Because (-3, y) is a solution of y = 3^-x, substitute -3 into the equation for x. So y = 3^-(-3) = 3^3 = 3 x 3 x 3  = 27. Answer y = 27, the point is (-3, 27)
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