Identify each function as linear or exponential.
1) \(f(x)=3x\)
2) \(f(x)= \left( \Large \frac{2}{3} \right) ^x\)
3) \(f(x)=-4^x\)
4) \(f(x)=7(2)^x\)
5) \(f(x)=7(0.5)x\)
Key:
1) Linear
2) Exponential, decay \(0<\Large \frac{2}{3}\normalsize<1\)
3) Exponential, growth \(4>1\)
4) Exponential, growth \(2>1\)
5) Linear