Question

find the average rate of change of the function from x1, to x2
f(x)= √2x from x1=2 to x2=8
Help pleaseeeee

Answer 1

its basically slope formula
\[\frac{f(8) -f(2)}{8-2}\]

Answer 2

so what I don't get is how did they get 1/3 as the answer???

Answer 3

i dont get it either :)
answer should be 1/2

\[f(x) = \sqrt{2x}\]
right

Answer 4

oh oops, yeah its 1/3

Answer 5

f(8) = sqrt16 = 4
f(2) = sqrt4 = 2

\[\frac{4-2}{8-2} = \frac{2}{6}=\frac{1}{3}\]

Answer 6

sorry wait from where did you get the 4

Answer 7

f(8) = sqrt(2*8) = sqrt16 = 4