Question

Find the average rate of change of the function f over the given interval. f(x)=0.25x^4-x^2-9x+8 from x=-4 to x=3

Answer 1

\[\frac{f(-4)-f(3)}{-4-3}\]
Use this to find the slope of the secant line from x=-4 to x=3

Answer 2

I don't understand how you put that into the problem.

Answer 3

No you put the problem into that

Answer 4

Do you know how to find f(-4)?

Answer 5

Would you put it into the equation?

Answer 6

Replace the x's in your function with -4's

Answer 7

Then to evaluate f(3)
Replace the x's in your function with 3's

Answer 8

So what I got is for f(-4)= 92 and f(3)= -7.75...is that right?

Answer 9

That is right ! :)

Answer 10

\[\frac{92-(-7.75)}{-4-3}\]

Answer 11

Ooooh wow I get it now! Thank you so much!