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franalej
Students
 
Posts: 21
Joined: Mon Jun 24, 2013 5:59 pm
 

GRE QC and Data Comparision Study Guide Errata?

by franalej Fri Aug 23, 2013 6:50 am

Hi,

In the appendix for GRE Math Glossary of the GRE QC and Data Comparision Study Guide (3rd Edition), for the example of the definition of "slope", your example states that the slope of the linear line shown is 2.

However, if you apply the slope formula: (y2-y1)/(x2-x1) the result is as follows:

points: (1,0) and (3,2):

(2-0)/(3-1) = 2/2 = 1

Why the difference between the result given by your study guide and the result given by the slope formula? Which is the right slope?

Thanks,

F
tommywallach
Manhattan Prep Staff
 
Posts: 1917
Joined: Thu Mar 31, 2011 11:18 am
 

Re: GRE QC and Data Comparision Study Guide Errata?

by tommywallach Fri Aug 23, 2013 8:21 am

Hey Fran,

Looks like an error. Obviously the slope of that line is 1 (it goes up one and over one, then up one and over one). Good catch! I'll forward it on to the team!

-t