College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter2: Functions And Graphs
Section2.4: Writing And Graphing Equations Of Lines
Problem 80E
Related questions
Question
![_6. The midpoint between the points A(-2,–3,1) and B(6,9, –3) is
(b) (2,3, –1).
(а) (-2,3, -1).
(c) (-4,–6,2).
(а) (4,6, —2).
_7. The direction numbers of the line passing through the points A(-2, –3,1) and B(6,9,–3) are
(a) 8, 12, 4 .
(b) –8, 12, 4.
(c) 8, –12,4.
(d) 8, 12, – 4.
_8. The parametric equations of the line passing through the points S(1,2, 3) and T(-1,–2,–5) are
(a) x = 1 + 2t, y = 2 + 4t, z = 3 + 8t.
(c) x = 1 – 3t, y = 4 – 2t, z = 3 – 8t.
(b) x = 1 + 2t, y = 2 – 2t, z = 3.
(d) x = 1 + 5t, y = -2 – 2t, z = 5 – 3t.
_9. Which of the following is the symmetric form of the line in number 8?
(b) =2
(4)=
(a) *+1 = +2 = z45
-2
(c)
y+2
%3D
z+5
z-5
-8
_10. The value of a so that the line x = 2 – 3t, y = 1 + at, z = –3 +9t is parallel to the line == is
(c) 6.
(a) 3.
(b) –3.
(d) –6.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F89373ea3-ca4e-44dd-ba8e-a7fa14485d0f%2Fde1cb3a4-838a-41a0-a051-d47eea8dad73%2Fi9w3q6i_processed.jpeg&w=3840&q=75)
Transcribed Image Text:_6. The midpoint between the points A(-2,–3,1) and B(6,9, –3) is
(b) (2,3, –1).
(а) (-2,3, -1).
(c) (-4,–6,2).
(а) (4,6, —2).
_7. The direction numbers of the line passing through the points A(-2, –3,1) and B(6,9,–3) are
(a) 8, 12, 4 .
(b) –8, 12, 4.
(c) 8, –12,4.
(d) 8, 12, – 4.
_8. The parametric equations of the line passing through the points S(1,2, 3) and T(-1,–2,–5) are
(a) x = 1 + 2t, y = 2 + 4t, z = 3 + 8t.
(c) x = 1 – 3t, y = 4 – 2t, z = 3 – 8t.
(b) x = 1 + 2t, y = 2 – 2t, z = 3.
(d) x = 1 + 5t, y = -2 – 2t, z = 5 – 3t.
_9. Which of the following is the symmetric form of the line in number 8?
(b) =2
(4)=
(a) *+1 = +2 = z45
-2
(c)
y+2
%3D
z+5
z-5
-8
_10. The value of a so that the line x = 2 – 3t, y = 1 + at, z = –3 +9t is parallel to the line == is
(c) 6.
(a) 3.
(b) –3.
(d) –6.
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