Question

¿cuáles son las unidades del eje y? * no se puede determinar miles de millones (número de personas) años tiempo

Explanation:

To solve this, we analyze the question "¿Cuáles son las unidades del eje y?" (What are the units of the y - axis?). The options are about different types of units. If the context is related to population (since one option is "miles de millones (número de personas)" - millions of millions (number of people)), and we assume a graph where the y - axis represents population, the unit would be related to the number of people. Among the options, "miles de millones (número de personas)" is a unit that can be used for the y - axis if it's measuring population.

The question asks for the units of the y - axis. If the context is population - related, "miles de millones (número de personas)" (millions of millions, number of people) is a valid unit for the y - axis when measuring population.

Answer:

miles de millones (número de personas)