If we say that one quantity is directly proportional to another quantity, does this mean that they are equal to each other?

If we say that one quantity is directly proportional to another quantity, we do not mean they are equal to each other.

DIRECT PROPORTION:

The term "direct proportion" refers to the relationship between two variables in which a change in one causes a similar change in the other.This means that when two quantities are directly proportional to one another, one quantity increases as the other increases and vice versa. For example, if quantity A is directly proportional to quantity B;when quantity A increases, quantity B also increaseswhen quantity A decreases, quantity B also decreases. Therefore, If we say that one quantity is directly proportional to another quantity, we do not mean they are equal to each other.

Learn more at: link

More information