Comments on: Graphs of logarithmic functions http://www.craigsmaths.com/ea003-engineering-mathematics-b/graphs-of-logarithmic-functions/ Mathematics Teaching for Learning Thu, 29 Jul 2010 18:06:19 +0000 http://wordpress.org/?v=2.6 By: Dann http://www.craigsmaths.com/ea003-engineering-mathematics-b/graphs-of-logarithmic-functions/#comment-165 Dann Tue, 27 Oct 2009 10:57:30 +0000 http://www.craigsmaths.com/?p=360#comment-165 doesn't the 'b' only translate the graph up or down? since lnbx can be expressed as lnx + lnb where lnb is a constant doesn’t the ‘b’ only translate the graph up or down? since lnbx can be expressed as lnx + lnb where lnb is a constant

]]> By: Craig Rose http://www.craigsmaths.com/ea003-engineering-mathematics-b/graphs-of-logarithmic-functions/#comment-9 Craig Rose Wed, 05 Nov 2008 09:51:03 +0000 http://www.craigsmaths.com/?p=360#comment-9 The key feature that identifies the base from a sketch is the point where $$y=1$$. For the simple log function (no transformations) this will be at $$x=the base$$. As the log of the base is equal to 1. In other words $$base^1=base$$. The key feature that identifies the base from a sketch is the point where y=1. For the simple log function (no transformations) this will be at x=the base. As the log of the base is equal to 1. In other words base^1=base.

]]> By: anon http://www.craigsmaths.com/ea003-engineering-mathematics-b/graphs-of-logarithmic-functions/#comment-7 anon Tue, 04 Nov 2008 07:15:47 +0000 http://www.craigsmaths.com/?p=360#comment-7 thanks for the help just wondering, what will graphs look like with different bases e.g. log( base 2) x compared to log (base 3)x and log (base 4) x thanks for the help
just wondering, what will graphs look like with different bases

e.g. log( base 2) x compared to log (base 3)x and log (base 4) x

]]>