look at this graph:\nis this relation a function?\nyes no

Explanation:

Step1: Recall function vertical line test

A relation is a function if no vertical line intersects its graph at more than one point.

Step2: Check each x-value

List the coordinates of the points: $(-4, 2)$, $(-2, 0)$, $(-2, -1)$, $(0, 3)$, $(1, 2)$, $(4, 4)$. Notice $x=-2$ maps to two y-values: $0$ and $-1$. A vertical line at $x=-2$ hits two points.

Answer:

no