The vast majority of all graphs do that.
It is the constant of proportionality.
It is a ratio.
Derived unit
It is a ratio.
Interval and ratio
nominal and ordinal is wrong; those are the two types of qualitative variables. Ratio and interval are the two types of quantitative variables.
If two graphs have exactly the same shape, it indicates that the variables are proportional to each other. This means that as one variable increases or decreases, the other variable changes in a consistent and fixed ratio.
Represent two variables on two axes.
x and y
They illustrate the relationship between two (or more) variables.
Quotient.
The vast majority of all graphs do that.
It is a ratio.
It is a ratio.
It is the constant of proportionality.
Derived unit