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# The slope of the line segment PQ is 2.If P has coordinates

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Senior Manager
Joined: 19 Feb 2004
Posts: 415
Location: Lungi
Followers: 1

Kudos [?]: 8 [0], given: 0

The slope of the line segment PQ is 2.If P has coordinates [#permalink]  23 Feb 2004, 06:47
The slope of the line segment PQ is 2.If P has coordinates (2,r) and Q has coordinates (5,t), what is the value of t-r?

a. 2/3
b. 3/2
c. 2
d. 3
e. 6
Senior Manager
Joined: 23 Sep 2003
Posts: 294
Location: US
Followers: 1

Kudos [?]: 2 [0], given: 0

Ans = E

Plot the lines. slope = 2/1 which is positive.

From P x-coordinate (2), move 2 steps up and one step over. You'll have to move 3 times to get to 5.
t-r = 6 = # of times you have to move up the y axis.
SVP
Joined: 30 Oct 2003
Posts: 1797
Location: NewJersey USA
Followers: 5

Kudos [?]: 41 [0], given: 0

Got E as well

y = mx + c is the equation

r = 2 * 2 + c
t = 2 * 5 + c
t-r = 2 *( 5-2 ) = 6
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