Checkpoint: The Horizontal Line Test Solution

For the given graph:


    • Name the domain and range for the graph and its inverse.

    • Explain whether or not the graph represents a function.

    • If the graph is a function, determine if it is one-to-one.

    • If the graph is a function, determine if the inverse is also a function.

Given
Domain: x|xR
Range: y|yR
Inverse

Domain: x|xR
Range: y|yR

This (cube root) graph is a function because it passes the VLT. The graph also passes the HLT. This means that the given function is one-to-one, and its inverse is also a function.

Note

Q: What type of equation does this graph represent? A: The cube root
Q: What do you know about the domain and range of this function? A: Both are all real numbers

To continue, return to the Online Lesson.

Customer Service

Monday–Thursday 8:30am–6pm ET