Average rate of change of f

[Oreo Kidd]

New to the forum and stuck on this problem: Let f(x)=-3x-2 and g(x)=8x+4.

Find the average rate of change of f.

Would appreciate any help!

Thanks.

 

[lookagain]

New to the forum and stuck on this problem: Let f(x)=-3x-2 and g(x)=8x+4.


Find the average rate of change of f.

Do you have a different/complete restatement of the problem, Oreo Kidd?

What level of mathematics are you in for this course?

 

[Oreo Kidd]

I'm in math 128, it's a pre-calc course. We're learning about linear/quadratic functions in this chapter.

It's a 3 part problem (a, b, c). Part a is asking for the average rate of change of f. Part b is asking to find the point of intersection between f and g. Part c is asking to solve the ineqaulity f(x) greater than or equal to g(x).

 

[Oreo Kidd]

I figured out the average rate of change, I'm trying to figure out the intersection part now.

 

[HallsofIvy]

Then there must have been some additional information you didn't tell us. The "average rate of change" has to be over some interval on the x-axis. To find the intersection of the two curves, solve -x- 2= 8x+ 4.

 

[lookagain]

Then there must have been some additional information you didn't tell us.
The "average rate of change" has to be over some interval on the x-axis. To find the intersection of the two curves,
solve -x- 2= 8x+ 4.

There is a typo in the quote box:

It should be "... solve -3x - 2 = 8x + 4."

 

[HallsofIvy]

Yes, thanks. I missed the"3".