i need help please. Using complete sentences, explain how to find the average rate of change for f(x) from x=4 to x=7
standard for is f(x)=2x^2-32x+64
vertex is y=(x^2-16x+32)

Question

tkhunny · Answer

Needs work, but it's a start...

What happenin' to the function, hey, from four to seven.
Dude, we ain't gotta' go all the way up to Heaven.
Where the function be when my Homes is four?
Just write the answer down.  Maybe on the floor.
Make the next stop all the way to seven.
That's where we gotta stop 'cause that is given.
What's the difference, man, we must get on that subtraction.
We almost done, I'm seeing the end o' this action.
What's the average rate?  Oh, we call out division.
Do it right the first time.  No time for revision.
The function changes WHAT?  We subtract for that!
My Man move three.  Don't keep under your hat.
Divide the change of function by that nice little three.
Show it to the teacher and then you're free.

Complete enough sentences?

anonymous · Answer

what im sorry im so lost and confuse?

tkhunny · Answer

Those are complete sentences.
That's the description of how to find the average rate of change.

anonymous · Answer

can you show me

anonymous · Answer

i forgot to give you this info 
standard for is f(x)=2x^2-32x+64
vertex is y=(x^2-16x+32)

tkhunny · Answer

I already showed you the complete sentences.  Kids these days!

$\dfrac{f(7) - f(4)}{7-4}$ -- That's it.

anonymous · Answer

lmao i am so sorry im still lost math just aint my thing

tkhunny · Answer

...or RAP, apparently.

What does f(7) mean?

anonymous · Answer

i dont know

tkhunny · Answer

Then you cannot solve this problem.

Oh well, at least you have my complete sentences.  I dare you to show them to your teacher.

anonymous · Answer

well thanxs for helping

tkhunny · Answer

You have a value for x = a.
If you have a function, f(x), the f(a) means you evaluate the function at x = a.  It's just a substitution problem.

Why have you been given this problem if you have not also been given the tools to solve it?  Is this a placement exam?  If so, you should miss this problem so that you can be assigned to the correct course where you will get the right exposure.