Exercise 6 Page 8

Let's take a look at the given graph.

The given function is constant, so its parent function is $y=1.$ Let's draw this function to compare it to the given one.

As we can see from the graph each $y\text{-}$value is being vertically shifted $2$ units up. The domain of both functions is all real numbers. The range of the parent function is $\{1\},$ and $f$ has a range of $\{3\}.$