Decide whether or not each table or graph below could represent a function. If not, circle what tells you it’s not a function. In a function, there is exactly one yvalue for each xvalue. If a table has more than one yvalue for the same xvalue, it can not represent a function.



Function or Not a Function? 
Function or Not a Function? 
Function or Not a Function? 



Function or Not a Function? 
Function or Not a Function? 
Function or Not a Function? 




Function or Not a Function? 
Function or Not a Function? 
Function or Not a Function? 
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, and 1738598). Bootstrap by the Bootstrap Community is licensed under a Creative Commons 4.0 Unported License. This license does not grant permission to run training or professional development. Offering training or professional development with materials substantially derived from Bootstrap must be approved in writing by a Bootstrap Director. Permissions beyond the scope of this license, such as to run training, may be available by contacting contact@BootstrapWorld.org.