
Bradley T. answered 01/23/23
Tutor for Python and High School and Middle School Math
The range is all the possible values y can take. You are correct that the minimum of y is 1.
From the graph you have added though, the function goes all the way up to 3. Th maximum value y can take is then 3.
Both of these points are included. The dot at 1 is colored in, and the maximum of the graph appears to reach 3, so in interval notation, this should be [1,3].