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# In an xy-coordinate system, if line k intersects the y-axis at (0,6) a

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Math Expert
Joined: 02 Sep 2009
Posts: 53066
In an xy-coordinate system, if line k intersects the y-axis at (0,6) a  [#permalink]

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06 Feb 2019, 00:54
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Difficulty:

25% (medium)

Question Stats:

76% (01:18) correct 24% (01:25) wrong based on 16 sessions

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In an xy-coordinate system, if line k intersects the y-axis at (0, 6) and has a slope of -3, then k intersects the x-axis at

A (-2, 0)
B (-1/2, 0)
C (1/2, 0)
D (2, 0)
E (3, 0)

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Joined: 18 Jul 2018
Posts: 679
Location: India
Concentration: Finance, Marketing
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Re: In an xy-coordinate system, if line k intersects the y-axis at (0,6) a  [#permalink]

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06 Feb 2019, 01:09
y = mx+c
m = -3 and c is 6 as c is the y-intercept.
y = -3x+6
Only points, which satisfy the equation is when x is 2 and y is 0.

D(2,0) is the answer.
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Re: In an xy-coordinate system, if line k intersects the y-axis at (0,6) a  [#permalink]

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06 Feb 2019, 03:13
Bunuel wrote:
In an xy-coordinate system, if line k intersects the y-axis at (0, 6) and has a slope of -3, then k intersects the x-axis at

A (-2, 0)
B (-1/2, 0)
C (1/2, 0)
D (2, 0)
E (3, 0)

m=y2-y1/x2-x1

x1,y1 = 0,6
and m = -3
x2,y2 = line intersecting at x axis will have y1 = 0
so
-3= 0-6/x2-0
x=2
coordinate (2,0)
IMO D
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Re: In an xy-coordinate system, if line k intersects the y-axis at (0,6) a   [#permalink] 06 Feb 2019, 03:13
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# In an xy-coordinate system, if line k intersects the y-axis at (0,6) a

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