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Re: Equation of a line is Y = ax + b [#permalink]
09 Sep 2007, 16:49

Fistail wrote:

studentnow wrote:

Equation of a line is Y = ax + b, What is the slope of the given line

1) X and Y intercept are same 2) 1<b<3

A.

1: intercept is 1. 2: seems the question is not designed properly. if x = y, then b can not be different from 0.

Fistail, can u please explain why b can not be anything else but zero?
Line with slope -1 can have any value of b, wich is why 2nd statement is insuff.

Re: Equation of a line is Y = ax + b [#permalink]
09 Sep 2007, 17:37

IrinaOK wrote:

Fistail wrote:

studentnow wrote:

Equation of a line is Y = ax + b, What is the slope of the given line

1) X and Y intercept are same 2) 1<b<3

A.

1: intercept is 1. 2: seems the question is not designed properly. if x = y, then b can not be different from 0.

Fistail, can u please explain why b can not be anything else but zero? Line with slope -1 can have any value of b, wich is why 2nd statement is insuff.

Since Y = ax + b and x = y, b should be 0. if not then x cannot be equal to y.

gmatclubot

Re: Equation of a line is Y = ax + b
[#permalink]
09 Sep 2007, 17:37

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