A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other remains constant. This means that as one quantity increases or decreases, the other quantity also increases or decreases by the same factor.
In a proportional relationship, if you double one quantity, the other quantity will also double. Similarly, if you halve one quantity, the other quantity will also halve. The constant ratio between the two quantities is called the constant of proportionality.
For example, if the cost of buying 4 apples is $8, then the cost of buying 8 apples would be $16, maintaining the constant ratio of $2 per apple.
Mathematically, a proportional relationship can be expressed as y = kx, where y represents the dependent variable, x represents the independent variable, and k represents the constant of proportionality.
In summary, a proportional relationship means that as one quantity changes, the other quantity changes in direct proportion to it.
This is a proportinal relationship
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