proportion
It is the constant of proportionality.
Two variables, X and Y, are said to be in direct proportion if X/Y is a constant. Equivalently, Y = cX for some constant c.
Direct Proportion
If two variables are in direct relationship then the ratio of the two variables is known as the constant of proportion between them. In algebraic form, if X and Y are the two variables, then direct proportionality implies that Y = cX and c is the constant of proportionality.
No, direct proportion does not necessarily need to have a slope of 1. A direct proportionality relationship means that as one variable increases, the other variable increases at a constant rate, which can be represented by the equation (y = kx), where (k) is a constant. If (k = 1), the slope will be 1, but any positive value of (k) will still represent a direct proportion, just with a steeper or shallower slope.
It is the constant of proportionality.
Porportions
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Two variables, X and Y, are said to be in direct proportion if X/Y is a constant. Equivalently, Y = cX for some constant c.
x and y are in direct proportion if there is some positive constant c such that y = cx
Direct Proportion
It is called direct variation.
If two variables are in direct relationship then the ratio of the two variables is known as the constant of proportion between them. In algebraic form, if X and Y are the two variables, then direct proportionality implies that Y = cX and c is the constant of proportionality.
It is a direct proportion.
Direct Proportion
Direct proportion, linear, first-order... all of these are valid answers, depending on the particular field you're talking about.
y = kx where k is a non-zero constant is an equation of direct proportionality between x and y.