Use a Determinant to Determine Whether the Points (-3, -9)

Multiple Choice

Use a determinant to determine whether the points (-3, -9) , (-5, -11) and (0, -7) are collinear.

A) $\left| \begin{array} { c c c } - 3 & - 9 & 1 \\- 5 & - 11 & 1 \\0 & - 7 & 1\end{array} \right| = 2 \text {; therefore, the points are not collinear }$
B) $\left| \begin{array} { c c c } - 3 & - 9 & 1 \\- 5 & - 11 & 1 \\0 & - 7 & 1\end{array} \right| = 0 \text {; therefore, the points are collinear }$