Uploaded July 2026 | Updated September 2026, 2 weeks ago
In this video, we connect mathematics to real life by starting with a practical situation that can be modeled using a linear function. From there, we explain the concept of linear growth, showing how values increase steadily over time. The lesson then shifts to linear decay, illustrating how values decrease at a constant rate and how this too can be captured through a linear function.
Courses on Khan Academy are always 100% free. Start practicing and saving your progress now!
khanacademy.org/math/ncert-math-class-9-new/x56891bfac37feca0:introduction-to-linear-polynomials
Timestamps:
00:00 Modelling real life situations
00:32 Understanding linear growth
03:19 Understanding linear decay
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: india.khanacademy.org/donate
In this video, we connect mathematics to real life by starting with a practical situation that can be modeled using a linear function. From there, we explain the concept of linear growth, showing how values increase steadily over time. The lesson then shifts to linear decay, illustrating how values decrease at a constant rate and how this too can be captured through a linear function.
Courses on Khan Academy are always 100% free. Start practicing and saving your progress now!
khanacademy.org/math/ncert-math-class-9-new/x56891bfac37feca0:introduction-to-linear-polynomials
Timestamps:
00:00 Modelling real life situations
00:32 Understanding linear growth
03:19 Understanding linear decay
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: india.khanacademy.org/donate










