Answer:
\(y=1^x\) is not exponential function.
A is correct
Step-by-step explanation:
Given: \(y=ab^x\)
We need to choose exponential equation. The property of exponential equation.
Possible value of b
If b>1 then exponential growth
If 0<b<1 then exponential decay
Option 1: \(y=1^x\)
Compare with exponential equation
\(1^x=ab^x\)
\(b\rightarrow 1\)
It is not exponential function.
Option 2: \(y=(\frac{1}{2})^x\)
Compare with exponential equation
\((\frac{1}{2})^x^x=ab^x\)
\(b\rightarrow \frac{1}{2}\)
It is decay exponential function.
Option 3: \(y=-2^x\)
Compare with exponential equation
\(-2^x=ab^x\)
\(b\rightarrow 2\)
It is Growth exponential function.
Hence, \(y=1^x\) is not exponential function.
