Question

Hi : ) how do you find the average rate of change for f(x) = x2 - 8x between x = 5 and x = 11?

Answer 1

would I plug in 5 then 11 and use the distance formula?

Answer 2

yes first you have to use that two x values to find f(x)
which same as y

Answer 3

after that u have to use slope formula to find slope

Answer 4

I got -15 and 33 for the two f(x) values

Answer 5

yes right
when substitute 5 u got -15 right so ( 5 , -15 )
and when u used 11 u got 33 so ( 11 , 33)
now use slope formula to find slope

Answer 6

\[\huge\rm \frac{ y_2 -y_1 }{ x_2 - x_1 }\]formula

Answer 7

11/-30?

Answer 8

nvm i used 55 instead of -15

Answer 9

-11/10

Answer 10

nope that is not right

Answer 11

how did you substitute x and y values ??

Answer 12

33-11 and -15-5

Answer 13

nope that is not right
in order pair first value is x and 2nd one is y \[\large\rm (x_1 , y_1) (x_2 , y_2)\]

Answer 14

8

Answer 15

perfect !!!!!!!

Answer 16

glad to work wth you :)

Answer 17

Thank you! You are a great help. ( :

Answer 18

\(\huge\color{green}{{\rm my }~\rm pleasure !! :)}\) \(\Huge \color{blue}{\star^{ \star^{\star:)}}}\Huge \color{red}{\star^{ \star^{\star:)}}}\)
great and good job!
glad to wrk wth u :)