7th Grade - Inverse Proportion

We have learned that when two quantities x and y are in direct proportion, both x and y increase or decrease at the same rate.

However, in our daily life, we do come across situations where an increase in one quantity results in a corresponding decrease in another related quantity or vice versa.

For instance, when a motorist travels at higher speeds, the time taken to cover a certain distance is reduced.

Below are a couple videos that might be helpful:

https://www.khanacademy.org/math/algebra/algebra-functions/direct_inverse_variation/v/direct-and-inverse-variation

http://www.onlinemathlearning.com/proportion-problems.html (3 videos at the bottom of the page) 

Homework: Direct and Inverse Proportion Worksheet