Use a determinant to find y such that $( 6 , - 15 ) , ( 12 , y )$ , and $( 15 , - 6 )$ are collinear.
A) $y = - 33$
B) $y = 15$
C) $y = 3$
D) $y = - 6$
E) $y = - 9$

Name: Use a determinant to find y such that $( 6 , - 15 ) , ( 12 , y )$ , and $( 15 , - 6 )$ are collinear. A) $y = - 33$ B) $y = 15$ C) $y = 3$ D) $y = - 6$ E) $y = - 9$
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Question

Quizplus · Accepted Answer

The points are collinear if the determinant of the matrix formed by their coordinates is zero. Solving the determinant equation for y gives $y = -9$.

Use a Determinant to Find Y Such That (6,−15),(12,y)( 6 , - 15 ) , ( 12 , y )(6,−15),(12,y)

Use a Determinant to Find Y Such That $( 6 , - 15 ) , ( 12 , y )$