Question

Pls answer its khan academy

Answer 1

`f(x)=9*(5)/(3)^x`

Explanation:

When x equals 0, that means a is going to be multiplied by 1 since any number to the power of 0 is 1, so
`f(0)=a=9`. When x equals 1, that means that
`f(1) = 9b=15`, so
`b=(15)/(9) =(5)/(3)`. This means that the equation should be
`f(x)=9*(5)/(3)^x`.

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