Which graph represents a proportional relationship?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.