alleryVector form of line: r = a + λ b where:
Ab is point
BAlways origin
Ca is point, b is direction (parameter λ)
DRandom
Answer & Solution
Correct answer: C. a is point, b is direction (parameter λ)
r = a + λ b: a is position vector of point on line, b is direction vector.
Parameter λ varies over reals to trace the entire line.
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