Answer
The table, equation, and graph are shown below.
Work Step by Step
Table: Table 1 below shows the number of triangles and the number of sides.
Equation: Let $y$ be the number of triangles and $x$ be the number of sides. Since the number of triangles is $\frac{1}{3}$ the number of sides, then
$$
y=\frac{1}{3}x
$$
Graph: Graph 1 below shows the relationship between the number of triangles and the number of sides.
