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

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Answer 1 · 2018-04-12T14:53:57

$color(blue)(y=27)$

We already know the value of $x$ from the coordinate, $x=-3$ .

The corresponding $y$ value is just $x=-3$ plugged into the function:

$y=3^(-(-3))=3^3=color(blue)(27)$

So $(-3,27)$

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