Juan dice que en la siguiente recta numérica el número señalado con la marca gris representa a 2/4 María dice que representa 1/2 y Laura dice que representa a 3/6 ¿Quién tiene razón 

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

Ithink if ur looking for a ratio it would be 12: 3