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A ball is thrown upward from the top of a building. The function below shows the height of the ball above the front, f(t), in feet, at different times (t) in seconds: f(t) = = -16t^2 + 34t + 80

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A ball is thrown upward from the top of a building. The function below shows the height of the ball above the front, f(t), in feet, at different times (t) in seconds: f(t) =  = -16t^2 + 34t + 80

anonymous · Answer

the average rate of change of f(x) from x = 5 to x= 7is_____.

ddcamp · Answer

$$Average\ Rate\ of\ Change = \frac{Change\ of\ x}{Change\ of\ time}$$

ddcamp · Answer

Or
$$\frac{f(b)-f(a)}{b-a}$$

anonymous · Answer

I was thinking i needed to plug in the numbers into the orignal equation?

ddcamp · Answer

Yeah.
Plug 7 and 5 into the equation to find f(7) and f(5).
Subtract f(5) from f(7), then divide by 2 (=7-5)

anonymous · Answer

Dang there are some crazy numbers im getting? should i be getting like 400 and 170 for the numbers in x = 5

anonymous · Answer

f(5) = -150

now should i divide by 2?