Question

Use the table of the function f(x) = x4 - 2x3 to answer this question:

Answer 1

x f(x)
-1 3
0 0
1 -1
2 0
3 27
What is the average rate of CHANGE from x = -1 to x = 1?
-2
0
2
4
@jim_thompson5910 Can you plz help me out!?

Answer 2

what is f(-1) equal to?

Answer 3

1

Answer 4

look for -1 in the x column

Answer 5

then look to the right of it to find f(-1)

Answer 6

oh sorry 3

Answer 7

f(-1) means "f(x) when x = -1"

Answer 8

yes f(-1) = 3

Answer 9

f(1) = ???

Answer 10

-1

Answer 11

now compute

\[\Large \frac{f(-1)-f(1)}{-1-1}\]

Answer 12

I'm using the formula

\[\Large \frac{f(a)-f(b)}{a-b}\]

in this case, a = -1 and b = 1

Answer 13

what do you get when you compute that fraction?

Answer 14

idk what to do..

Answer 15

\[\Large \frac{f(-1)-f(1)}{-1-1} = \frac{3-(-1)}{-1-1} = ??\]

Answer 16

2

Answer 17

close

Answer 18

-2? lol

Answer 19

@jim_thompson5910

Answer 20

yes you misplaced a negative sign somewhere

Answer 21

the answer is -2

Answer 22

yeah ahah thank you so much i feel dumb for doing that xD

Answer 23

its ok, you're welcome