Question

Help me graph this : y=3log(-x)

Answer 1

well how do you graph a log(x) first of all

Answer 2

what does the "3" signify ?

Answer 3

http://lmgtfy.com/?q=y%3D3log(-x)

Answer 4

@Azteck you don't get google on tests. don't make it a habit

Answer 5

no, i need help understanding*** the graph !

Answer 6

so first graph log(x)

Answer 7

okay so it's exponential ad goes through the point (0,1)

Answer 8

Isn't it just using what you do when you graph parabolas? If you have 3x^2 it means you get a much steeper curve.

Answer 9

i just want the base means

Answer 10

want to know what **

Answer 11

so look at 2*x and 1*x and 3*x . it just makes it steeper

Answer 12

but like steeper but you much

Answer 13

...?

Answer 14

how much*

Answer 15

sorry idk what im typing -.-

Answer 16

i meant to ask, how do we know how much steeper it is, like is there a point we can determine ?

Answer 17

well that's why there's a 3. look at the slope in 2x+0,3x+0,4x+0 etc. how do you know the slope? slope = rise / run

Answer 18

You just write the equation of that curve on the graph and just guess. Because log(-x) with coefficients all cut at -1, you just need to label the equation. I'm pretty sure you will be correct.

Answer 19

@Azteck i wish, but no..there is a method of doing it but i'm not sure how to do it with a coefficient in front of log

Answer 20

ok so with log.... there's no _real_ way per say . it's more like log(number) = some decimal, does it really look like 3* decimal? it's sort of rounding. for things log base 2. you can do it. for log base e, it's not that nice