2 Answers

Villintehaspam · Answer 1 · 2017-09-10T14:06:52+0000

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)

Ecorvo · Answer 2 · 2017-09-12T02:46:08+0000

Simply plug in x= -3 in to y = 3^-x, and solve for y.

$y=3^(-(-3))\\\\y = 3^3\\\\\boxed{\bf{y=27}}$

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

Your final answer is y = 27.

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