which point represents the unit rate?\na\nb\nc

Explanation:

Step1: Recall unit - rate definition

The unit rate is the value of $y$ when $x = 1$. In a graph of a proportional relationship $y=mx$ (where $m$ is the slope or unit rate), the point on the line with $x = 1$ gives the unit rate.

Step2: Identify the point with $x = 1$

Looking at the graph, when $x = 1$, the point on the line is $C$. The coordinates of point $C$ are $(1,\frac{1}{2})$. The $y$-value at $x = 1$ represents the unit rate.

Answer:

C