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

question 19

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

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