GMAT Quantitative Reasoning Practice Test 6

Question : 23 of 100

Marks: +1, -0

What is the
slope of line

m

?
(1) Line

m

intersects the

x

-axis at the point

(4,0)

.
(2) The equation of line

m

3 y=x-4

Statement (1), BY ITSELF, will suffice to solve the problem, but NOT statement (2) by itself.
Statement (2), BY ITSELF, will suffice to solve the problem, but NOT statement (1) by itself.
The problem can be solved using statement (1) and statement (2) TOGETHER, but not ONLY statement (1) or statement (2).
The problem can be solved using EITHER statement (1) only or statement (2) only.
The problem CANNOT be solved using statement (1) and statement (2) TOGETHER.

Solution:

Statement (2) is sufficient. Change the equation to

y=m x+b

form, where

m

is the slope of the line and

b

is the

y

-intercept.

3 y=x-4

becomes

\;{1}/{3} x-\;{4}/{3}

The slope of the line is

1 / 3

. Statement (1) is not sufficient because we cannot tell the slope of line by only looking at the

x

-intercept.

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