It is called direct variation.
A [directly] proportional relationship between two variables, X and Y implies thatY = cX where c is the constant of proportionality.
an equation that expresses a relationship between two or more quantities
it is called an inequality
it would be a function * * * * * Not always. It depends on the direction of the relationship. Consider y = x2 where x is a real number. The relationship from x to y is a function but the one in the opposite direction (x = sqrt(y) is not a function because it is a one-to-many mapping.
The relationship is called a surjection or a surjective function.
A linear relationship
It is called direct variation.
it is a proportional relationship because a proportional relationship is known as a relationship between two quantities in which the ratio of one quantity to the other quantity is constant.
It is a direct proportion.
The relationship is a linear one. For example when driving at a constant speed, the relationship between distance driven and the time driven is linear with a constant ratio (of the constant speed).
Direct variation.
A proportional relationship between two quantities is one in which the two quantities called the unit rate, the rate of change, or the constant of proportionality.
In that case, one quantity (the quantity that depends on the other) is said to be a function of the other quantity.
A math expression is a symbol or combination of symbols that represents a quantity or a relationship between quantities.
the differentiate between fundamental quantity and derived quantity?
A [directly] proportional relationship between two variables, X and Y implies thatY = cX where c is the constant of proportionality.
The relations between quantities are stated by multiplicative relationship between the quantities.