Examine the graph of line $\overleftrightarrow{CM}$ at right.  

1. Find the equation of $\overleftrightarrow{CM}$.

   Hint (a):

   You can calculate the slope of the line by using the coordinates of points $C$ and $M$ in the formula below.

   $\frac{\Delta y}{\Delta x}=\frac{y_2-y_1}{x_2-x_1}$

2. Find the area and perimeter of $ΔCPM$.

   Partial Answer (b):

   $\text{Area}=4\text{ units}^2$

3. Write an equation of the line through point $M$ that is perpendicular to $\overleftrightarrow{CM}$.

   Hint (c):

   The slopes of perpendicular lines are negative reciprocals.