# RBSE Class 8 Maths Notes Chapter 13 Direct and Inverse Proportions

These comprehensive RBSE Class 8 Maths Notes Chapter 13 Direct and Inverse Proportions will give a brief overview of all the concepts.

Rajasthan Board RBSE Solutions for Class 8 Maths in Hindi Medium & English Medium are part of RBSE Solutions for Class 8. Students can also read RBSE Class 8 Maths Important Questions for exam preparation. Students can also go through RBSE Class 8 Maths Notes to understand and remember the concepts easily. Practicing the class 8 maths chapter 6 try these solutions will help students analyse their level of preparation.

## RBSE Class 8 Maths Chapter 13 Notes Direct and Inverse Proportions

→ Two quantities x and y are said to be in direct proportion if they increase (decrease) together in such a manner that the ratio of their corresponding values remains constant. That is if $$\frac{x}{y}$$ = k [k is s positive number], then x and y are said to vary directly. In such a case if y1, y2 are the values of y corresponding to the values x1 x2 of x recpectively then
$$\frac{x_{1}}{y_{1}}=\frac{x_{2}}{y_{2}}$$ and $$\frac{x_{1}}{y_{1}}=\frac{x_{2}}{y_{2}}=\frac{x_{3}}{y_{3}}$$ = .............. k

→ Two quantities x and y are said to be in inverse proportion if an increase in x causes a proportional decrease in y (and vice-versa) in such a manner that the product of their corresponding values remains constant. That is, if xy = k, then x and y are said to vary inversely. In this case y1, y2 are the values of y corresponding to the values x1 x2 of x respectively then x1y1 = x2y2 or $$\frac{x_{1}}{x_{2}}=\frac{y_{2}}{y_{1}}$$ and x1y1 = x2y2 = x3y3 = k. Last Updated on June 1, 2022, 2:53 p.m.
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Published June 1, 2022