Question

Log Question

Answer 1

graph*

Answer 2

Are you supposed to graph something?

Answer 3

Yeah I'm supposed to graph that logarithm function

Answer 4

\[y=\log_{3}(x-1) \]

Answer 5

Is that what you are supposed to graph?

Answer 6

It showed it like what I posted up above, but yeah I think that's what it's supposed to be.

Answer 7

(1) You could put it into its exponential form and get some ordered pairs.
(2) You could get some ordered pairs by choosing values of x so that x-1 will be a power of 3
(3) You could graph y = log(base3)(x) and move it one space to the right.

Answer 8

Oh yeah ok the one I most familiar with from the lesson is the second one. So is this correct?
If x=1, y-1
If x=2, y-3
If x=3. y-9
If x=4, y-27 ?

Answer 9

x=1,y-0*

Answer 10

if you are using geobegra to graph the log use

log(3,x-1)

then press enter... geogebra will give it a function name... f or g or whatever

Answer 11

the form is log(b, x) b is the base and x is the function

Answer 12

If x = 2, x-1=1 and 3^0=1 which gives the ordered pair (2,0)

Answer 13

If x = 4, x-1=3 and 3^1=3 so y = 1 which gives the ordered pair (4,1)

Answer 14

k thx! :) gonna try it right now, & yep it worked. & k so \[\log _{3}(x-1) \] would be exponential form which its already in right?

Answer 15

If x = 10, 10-1 = 9 and 3^2=9 which gives the ordered pair (10,2)

Answer 16

Ok I'm sort of getting it @Mertsj but I'm confused a bit on getting the y-value. I can see it's the 3^1, 3^2, 3^3 part, but you get that by equaling out the bases right?
Like for instance you have 10-1=9 & that's 3^2, so the ^2 = y right?

Answer 17

\[y=\log_{3}(2-1) \]

Answer 18

because the base of the log is 3, so that's why you had to make 9 = 3^2 right?

Answer 19

\[3^y=1\]

Answer 20

so if you want to see the values go to view and spreadsheet

in column A enter 1, 2, 3, 4, 5,6 etc

then in cell B1 enter log(3, A1)

press enter and it returns a value...

then you can copy that cell and paste the formula into the other B column cells

Answer 21

Okay I get it now :) Thx 2 u both @Mertsj & @campbell_st

Answer 22

& thx 4 showing me how 2 put logarithms on geogebra @campbell_st

Answer 23

yw

Answer 24

welcome... to input the function correctly use
if cell A1 is 2
then in B1 type
log(3, (A1) -1)

then you will be able to create a list of points and see them on the curve

good luck