The thing that is required for a <span>proportional relationship would be that no matter what the order of the relationship is, it should be that if the function of x increases then x would increases as well or vice versa. Hope this helps. Have a nice day. Feel free to ask more questions. </span>
A proportional relationship is a relationship of two variables that are related by a constant of proportionality, this can be written as:
y = k*x
where k is the constant of proportionality.
While a linear equation has the form:
y = a*x + b
where a is the slope and b is the y-intercept.
you can see that the only difference is that in the case of the proportional relationship we do not have any y-intercept term, so the thing that is required in the proportionality relationship is that b = 0, while in a linear relationship b can take any value.
