6. Graph the function $f(x)=2^{x+1}$

Step 1 ：Generate a range of x-values.

Step 2 ：Compute the corresponding y-values using the function $f(x)=2^{x+1}$.

Step 3 ：Plot these points on a graph.

Step 4 ：The graph of the function $f(x)=2^{x+1}$ is an exponential curve that increases as x increases. The curve is above the x-axis for all x, and it approaches the x-axis as x approaches negative infinity. The curve increases rapidly as x increases.

Step 5 ：\(\boxed{\text{The graph of the function } f(x)=2^{x+1} \text{ is an exponential curve that increases as x increases.}}\)