## anonymous one year ago For f(x) = 0.01(2)x, find the average rate of change from x = 3 to x = 8

1. Nnesha

f(x) is same as y so $\huge\rm y=0.01(2)^x$ we need y value to find average rate of change (slope) so first substitute x for 3 and then for 8 to find y value

2. Nnesha

let's find y when x =3 substitute x for 3 $y=0.01(2)^3$ solve

3. anonymous

Y=.08 and slope is 0?

4. Nnesha

y =0.08 when x= 3 right but how did you get 0 slope ?

5. Nnesha

find y when x = 8 substitute x for 8

6. Nnesha

well... i have to go find y when x=8 just like we did for x=3 then use slope formula $\huge\rm \frac{ y_2 -y_1 }{ x_2 -x_1 }$ plugin x's and y's value