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## lexigolds9 Group Title the average rate or change of f(x)=5x^2 - 2, from 2 to 4 2 years ago 2 years ago

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1. myininaya

$\frac{f(4)-f(2)}{4-2}$

2. lexigolds9

what do the fs stand for? i get the bottom will be 2

3. myininaya

Well you have $f(x)=5x^2-2$

4. myininaya

$f(4)=5(4)^2-2 \text{ and } f(2)=? \text{ I will let you say what } f(2) \text { is }$

5. lexigolds9

5(2)^2

6. lexigolds9

-2

7. lexigolds9

60/2 ??????????

8. lexigolds9

or 30/1 simplied. cause they are asking simplified answer.

9. lexigolds9

or just 30. am i right

10. myininaya

Yes 60/2 does equal 30