This video looks at Identity and constant functions. We define them, draw them out, and find their domain and range. We break down the definition of the function given in set-builder form and plot the graph by connecting points on the cartesian plane. Domain and Range is calculated through visually observing the graph. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! ( :relations-and-functions-ncert-new/xea4762213f311c5e:functions/e/domain_and_range_0.5) Timestamps: 00:00 Defining Identity function 01:54 Plotting Identity function 02:59 Domain and Range of Identity function 03:38 Defining constant function 04:08 Plotting constant function 05:21 Domain and Range of constant function Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: Created by Ashish Gupta