
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
January 8th, 2012, 06:46 PM  #1 
Senior Member Joined: Jan 2012 Posts: 100 Thanks: 0  True and False questions regarding Slope!
Hello everybody, I have been working on this for a while, I can't seem to get the correct answers. Which of these 6 questions is true and which ones false? I really appreciate your help. I am new to this forum but I have heard many many great things about it from friends. I hope I can get help, and at the same time, possibly help you as well. (1) If x1 =/= x2 then the slope of the line through the points (x1,y1) and (x2,y2) is m=(y2y1)/(x2x1) (2) The slope of the line through the points (x1,y1) and (x2,y2) is m=(y2y1)/(x2x1) (3) Two lines are parallel if and only if they have the same slope or are vertical (4) If x1 =/= x2 then the slope of the line through the points (x1,y1) and (x2,y2) is m=(y2y1)/(x1x2) (5) Two lines are parallel if and only if they have the same slope (6) If x1 =/= x2 then the slope of the line through the points (x1,y1) and (x2,y2) is m=(y1y2)/(x1x2) 
January 8th, 2012, 06:59 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,163 Thanks: 472 Math Focus: Calculus/ODEs  Re: True and False questions regarding Slope!
For 1, 2, 4, and 6: Note that m is only defined for . If then the line is vertical. For 3 and 5: Two lines are parallel if they have the same slope OR if both are vertical (in which case the slopes are undefined). Can you see which are true and which are false now? Btw, this is a precalculus topic, so I have moved it accordingly. 
January 8th, 2012, 07:04 PM  #3 
Senior Member Joined: Jan 2012 Posts: 100 Thanks: 0  Re: True and False questions regarding Slope!
so then, (1) true (2)true (3)true (4)false (5)false (6)true are those correct? 
January 8th, 2012, 07:16 PM  #4 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,163 Thanks: 472 Math Focus: Calculus/ODEs  Re: True and False questions regarding Slope!
2) is false because there was no accounting for when which gives an undefined slope. The rest are correct. 
January 8th, 2012, 07:19 PM  #5 
Senior Member Joined: Jan 2012 Posts: 100 Thanks: 0  Re: True and False questions regarding Slope!
Awesome, Thanks a bunch! got it correct

January 8th, 2012, 07:23 PM  #6 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,163 Thanks: 472 Math Focus: Calculus/ODEs  Re: True and False questions regarding Slope!
Glad to help! Welcome to the forum too. 

Tags 
false, questions, slope, true 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
True or false  kingkos  Algebra  1  January 6th, 2014 05:18 AM 
true and false .?  sam_17  Abstract Algebra  12  March 29th, 2012 02:27 PM 
true or false???  shimaa  Calculus  1  February 17th, 2012 11:45 AM 
True or False and WHY?  bradycat  Algebra  2  January 31st, 2009 07:28 AM 
True and False questions regarding Slope!  pomazebog  Calculus  1  December 31st, 1969 04:00 PM 