Question

Is the answer a, b, c, or d.

Answer 1

The answer is b.


`y=0.5(0.87)^(x)`

This is true because this exponential function is given by this form:


`f(x)=ka^(x)`

where
`k\ \textgreater \ 0` and
`0\ \textless \ a\ \textless \ 1`. So given that a = 0.87, that is, a number less than 1, then the equation will represent an exponential decay