Question

Use the graph of f(x) = log x to obtain the graph of g(x) = log x + 5. I will post the graphs

Answer 1

@rafabc02

Answer 2

This problem is PERFECT for Geogebra.
http://www.geogebra.org/cms/installers

It's free, works on Windows & Mac. :)

Answer 3

You can evaluate at x=0 and see what you get. Then you shoud remmeber the graph of log (x).

Answer 4

Sorry, I mean evaluate at x=1

Answer 5

i dont understand :/

Answer 6

thnx for the tip @mathteacher1729

Answer 7

have u studied graph transformations?

Answer 8

i did for quadratic functions

Answer 9

then do u know what happens in this case:
say, f(x) = x^2 and g(x) = x^2 + 1
then how will u transform f(x) to get g(x) ?

Answer 10

g(x) is transformed up 1? or was it left 1?

Answer 11

its up 1. because the transformation is happening to the y-variable. so the graph will move along y-axis. for a better explanation, view this page:
http://www.purplemath.com/modules/fcntrans.htm
so, now can u relate this with ur question above?

Answer 12

so its B? but when i plug it into my calculator i get D..

Answer 13

yes, it should be B. i dont know why u're getting D.

Answer 14

ok thnx!

Answer 15

hang on!

Answer 16

yes, its B for sure!

Answer 17

here, if u want to confirm:
https://www.google.co.in/search?sugexp=chrome,mod=19&sourceid=chrome&ie=UTF-8&q=what+is+log0%3F#hl=en&sclient=psy-ab&q=graph+of+log+x+%2B+5&oq=graph+of+log+x+%2B+5&gs_l=serp.12..0i8i30l4.1548.4483.5.7492.5.4.1.0.0.0.144.545.0j4.4.0...0.0...1c.-HMwYeET2WQ&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=cb0138a496693fa9&biw=1366&bih=667

Answer 18

thank u soo much!

Answer 19

sure, no problem! :)

Answer 20

go through the link i gave before (about the graph transformation) and u'll be able to solve such problems without much difficulty!