Question

What are the domain and range of this exponential function y=-2.10×

Answer 1

The function is

`y=2(10)^x`

Domain is the values of x

The domain is all the real numbers

The range is the values of y that corresponding to the values of x

Since the initial value of y is positive, then any value of x will make y positive, then

The range is all the values greater than zero

`\begin{gathered} \text{Domain}=\text{ all values of real numbers} \\ \text{Range}=\mleft\lbrace y\colon y>0\mright\rbrace \end{gathered}`