Find the average rate of change of
f(x)= 2x^2 - 9x
from
x=2 to x=6
.

Simplify your answer as much as possible.

Question

Find the average rate of change of 
f(x)= 2x^2 - 9x
 from 
x=2 to x=6
.

Simplify your answer as much as possible.

anonymous · Answer

@satellite73

anonymous · Answer

we need some numbers 
$$f(6),f(2)$$ to start

anonymous · Answer

$$f(6)=2\times 6^2-9\times 6=18$$
$$f(2)=2\times 2^2-9\times 2=-10$$

anonymous · Answer

what you want to compute is the slope 
$$\frac{f(6)-f(2)}{6-4}$$ which is in this case 
$$\frac{18-(-10)}{6-2}$$

anonymous · Answer

i get 
$$\frac{28}{4}=7$$

anonymous · Answer

oh wow that makes so much more sense the explanations I had been looking up! thank you so much! that really wasn't as complicated as I was thinking

anonymous · Answer

lol no it is just the slope of the line between the points $(2,-10)$ and $(6,18)$

anonymous · Answer

Lol everything I looked up or watched looked really drawn out =p