<PRE><B>Question 1140964</B>
A linear relation is a relation that forms a straight line.
:
In a right triangle, two line segments are perpendicular(right angle) to each other if their slopes are the negative reciprocal of each other
:
slope of line segment AB = (-4 -0)/(4 -2) = -2
:
slope of line segment BC = (-2 -(-4))/(-2 -4) = -1/3
:
slope of line segment CA = (0 -(-2))/(2 -(-2)) = 1/2
:
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line segments AB and CA are perpendicular to each other, therefore triangle ABC is a right triangle
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