When referring to direct proportion, as one quantity increases, what happens to the other?

When referring to direct proportion, as one quantity increases, what happens to the other?

• A. It remains constant
• B. It decreases
• C. It may change unpredictably
• D. It increases

Answer: (D)

In the context of direct proportion, two quantities are directly related, meaning they change in conjunction with one another. When one quantity increases, the other quantity also increases in a predictable manner. This relationship can be characterized by the equation \( y = kx \), where \( k \) is the constant of proportionality. As variable \( x \) increases, \( y \) will increase in a way that maintains the ratio \( y/x \) constant. This predictable and consistent relationship between the two quantities is key to understanding direct proportions, thus confirming that when one quantity rises, the other does too.

In the context of direct proportion, two quantities are directly related, meaning they change in conjunction with one another. When one quantity increases, the other quantity also increases in a predictable manner. This relationship can be characterized by the equation ( y = kx ), where ( k ) is the constant of proportionality. As variable ( x ) increases, ( y ) will increase in a way that maintains the ratio ( y/x ) constant. This predictable and consistent relationship between the two quantities is key to understanding direct proportions, thus confirming that when one quantity rises, the other does too.