CPM Homework Help : MC1 Problem 2-12

Copy the dot pattern at right onto your paper.

Draw the $4^{\text{th}}$ and $5^{\text{th}}$ figures.
How many dots would be in the $30^{\text{th}}$ figure? Explain how you know.

$\; \begin{array} {c c} \Large\bullet\\ \Large\bullet & \Large\bullet \end{array}\\ \text{Figure 1}$

$\begin{array} {c c c} \Large\bullet\\ \Large\bullet\\ \Large\bullet\\ \Large\bullet & \Large\bullet & \Large\bullet \end{array}\\ \; \; \text{Figure 2}$

$\begin{array} {c c c c} \Large\bullet\\ \Large\bullet\\ \Large\bullet\\ \Large\bullet\\ \Large\bullet\\ \Large\bullet & \Large\bullet & \Large\bullet & \Large\bullet \end{array}\\ \quad \; \, \text{Figure 3}$