This is a simple task touching on two key points of functions. First, there is the idea that not all functions have real numbers as domain and range values. Second, the task addresses the issue of when a function admits an inverse, and the process of "restricting the domain" in order to achieve an invertible function.

### General Information

**Subject(s):**Mathematics

**Grade Level(s):**9, 10, 11, 12

**Instructional Time:**5 Minute(s)

**Freely Available:**Yes

**Keywords:**Your Father, functions, domain values, range values, cpalms, icpalms, illustrativemathematics.org, illustrative mathematics, tasks, mathematics, math, resource, free, freely available, problems-based learning, student activities, Florida Standards, inverse function

**Instructional Component Type(s):**

**Problem-Solving Task**

**Resource Collection:**Illustrative Mathematics