Determine from its graph if the function is one-to-one.

Step 1 of 3:

In this question, we have to determine the function is one to one or not.

Step 2 of 3:

Plotting graph of f(x)

So, by using the horizontal line test, we can easily determine the function is one to one or not.

The function is one to one only if the graphs intersect each horizontal line at least one time.