Use a Determinant to Determine Whether the Points (-3,-9), (-5,-11)and

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) $$\left| \begin{array} { c c c } - 3 & - 9 & 1 \\- 5 & - 11 & 1 \\0 & - 7 & 1\end{array} \right| = 0 \text {; therefore, the points are collinear }$$