## anonymous one year ago Work through this with me?? What is the rate of change for f(x) = −2 cos 4x − 3 on the interval from x = 0 to x = ?

1. anonymous

@ganeshie8 @mathmath333 @math&ing001 @misssunshinexxoxo @paki

2. freckles

you are looking for the average rate of change over what interval? well if you are really finding the average rate of change of f over the interval x=0 to x=? then you just evaluate: $\frac{f(?)-f(0)}{?-0}$

3. anonymous

so what would you do with the ? @freckles

4. freckles

plug it into f just like you plug in 0 into the f

5. anonymous

how do you plug in a question mark lol

6. freckles

$f(?)=-2\cos(4?)-3$