Can someone let me know, how to resolve this question ?
Thanks in advance.
Slope of Line
This topic has expert replies
-
- Newbie | Next Rank: 10 Posts
- Posts: 8
- Joined: Thu May 29, 2008 12:01 pm
-
- Legendary Member
- Posts: 829
- Joined: Mon Jul 07, 2008 10:09 pm
- Location: INDIA
- Thanked: 84 times
- Followed by:3 members
the very simple logic here is to understand that we know the slope is negative . and for an equation ax + by + c=0 the slope is -a/bBaskaranselva wrote:Can someone let me know, how to resolve this question ?
Thanks in advance.
hence it cant be zero and a negative number will make the slope positive..
hence choose a positive value.. which is 6.
hope it helps..
-
- Legendary Member
- Posts: 1153
- Joined: Wed Jun 20, 2007 6:21 am
- Thanked: 146 times
- Followed by:2 members
I think Sudhir posted the correct solution for the wrong question. The above solution is for the other slope question you posted.
Statement I and II alone are insufficient, because we need both the intercepts to find the slope since no other information is given.
Slope of the line = -a/b
a is the x intercept
b is the y intercept.
slope = -2/3
Hence C is the answer.
Statement I and II alone are insufficient, because we need both the intercepts to find the slope since no other information is given.
Slope of the line = -a/b
a is the x intercept
b is the y intercept.
slope = -2/3
Hence C is the answer.
-
- Senior | Next Rank: 100 Posts
- Posts: 43
- Joined: Tue Mar 18, 2008 5:59 pm
- Thanked: 4 times
- Followed by:1 members
Shouldn't the slope be -3/2...y-intercept/x-intercept...parallel_chase wrote:I think Sudhir posted the correct solution for the wrong question. The above solution is for the other slope question you posted.
Statement I and II alone are insufficient, because we need both the intercepts to find the slope since no other information is given.
Slope of the line = -a/b
a is the x intercept
b is the y intercept.
slope = -2/3
Hence C is the answer.
slope = (y2-y1)/(x2-x1)= (3-0)/(0-2)= -3/2...
-
- Master | Next Rank: 500 Posts
- Posts: 227
- Joined: Thu Aug 14, 2008 10:43 am
- Thanked: 7 times
- Followed by:1 members
- GMAT Score:650
By just knowing an x-intercept - a line could be parallel to y-axis or it can make some slope (in that case you need to know y-intercept) - so I is insufficient
Similarly, just knowing y-intercept could mean a line could be parallel to x-axis or may be making a slop for which you need to know x-intercept
thus, statement II is insuffient
Therefore, by combining statement I and II - you get both x and y intercept to know where the line is heading - and there can find the slope
m = y2 - y1/x2-x1
Similarly, just knowing y-intercept could mean a line could be parallel to x-axis or may be making a slop for which you need to know x-intercept
thus, statement II is insuffient
Therefore, by combining statement I and II - you get both x and y intercept to know where the line is heading - and there can find the slope
m = y2 - y1/x2-x1
Hi...
I also agree with bha...the slope shud b -3/2...
But now that ax+by+c=0,
y = -a/bx - c/b
Comparing with y=mx+c
m=-a/b = -2/3
This is incorrect as here a & b are co-efficients of x & y and in the problem, we r given the x & y intercepts...
So, slope = - (Y int) / (X int)
I also agree with bha...the slope shud b -3/2...
But now that ax+by+c=0,
y = -a/bx - c/b
Comparing with y=mx+c
m=-a/b = -2/3
This is incorrect as here a & b are co-efficients of x & y and in the problem, we r given the x & y intercepts...
So, slope = - (Y int) / (X int)