Question

What affect does the "a" value have on the function f(x) = log(x)?

The "a" value reflects the graph across the y-axis.

The "a" value moves the function up or down.

The "a" value moves the function to the left or right.

The "a" value stretches the function vertically by a factor of |a|.

Answer 1

@hartnn

Answer 2

http://openstudy.com/study#/updates/580b0ea1e4b012711f1884ee

Answer 3

Thought you already go the answer from the previous post @Directrix linked you.
As a resumé of what your book told you:
In the equation,
\(g(x)=a f(bx-h)+k\)
g(x) is mapped from f(x) with
1. vertical stretch of f(x) by a scale factor of "a".
2. horizontal stretch of f(x) by a scale factor of "1/b"
3. horizontal shift (to the right) by a distance of "h"
4. vertical shift (upwards) by a distance of k.
Note the sigh \(before\) h is negative. So take care when evaluating the value of h.

Answer 4

*sign