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11 Oct 2016, 05:00
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
73% (01:48) correct
27%
(02:06)
wrong
based on 244
sessions
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On the coordinate planes system there are line L and line M, y=3x+2 and y=kx, respectively. For which of the following value of k did the line L intersect with the line M?
I. -3 II. -1 III. 3
A. none
B. I only
C. III only
D. I & II
E.II & III
I. -3 II. -1 III. 3
A. none
B. I only
C. III only
D. I & II
E.II & III
11 Oct 2016, 09:36
Kudos
Bookmarks
MathRevolution
Two Lines will Intersect only if lines are NOT parallel
Lines will be parallel only if their slopes are EQUAL
Slopes of y=3x+2 and y=kx are 3 and k respectively
therefore, for them to intersect, k must NOT be equal to 3
i.e. k may be -3 or -1 out of the given choice
Answer: Option D
General Discussion
11 Oct 2016, 06:23
Kudos
Bookmarks
MathRevolution
Answer D.
All the diagrams are shown in the diagram below.
y=3x and y=3x+2 means the lines are parallel and the 2nd line is just two units above the first.
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