Marcar la casilla correspondiente a cada gráfico que represente una función.

A graph represents a function if and only if every vertical line drawn through the graph intersects the graph at most once. If a vertical line intersects the graph at two or more points, then it is not a function.

Observe the points plotted on "Gráfico 1":

• At $x = -3$, there is one point $(-3, -1)$.
• At $x = -2$, there is one point $(-2, -2)$.
• At $x = -1$, there is one point $(-1, 2)$.
• At $x = 0$, there is one point $(0, -1)$.
• At $x = 1$, there is one point $(1, 0)$.
• At $x = 2$, there is one point $(2, -2)$.
• At $x = 3$, there is one point $(3, -3)$.

For every x-value in "Gráfico 1", there is only one corresponding y-value. This means that no vertical line would intersect more than one point on the graph. Therefore, "Gráfico 1" represents a function.

Since only "Gráfico 1" is visible, we can only evaluate this graph.

The graph that represents a function is:
Gráfico 1