SOLUTION: how do I solve y = 4^(-x)

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Question 467414: how do I solve y = 4^(-x)
Found 2 solutions by jim_thompson5910, josmiceli:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Solving for x:


y=4%5E%28-x%29


ln%28y%29=ln%284%5E%28-x%29%29


ln%28y%29=-x%2Aln%284%29


-ln%28y%29%2Fln%284%29=x


-log%284%2C%28y%29%29=x


x=-log%284%2C%28y%29%29

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You can't solve it. There is 1 equation
and 2 variables. Here's a plot:
+graph%28+400%2C+400%2C+-6%2C+6%2C+-6%2C+6%2C++4%5E%28-x%29%29+