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Mathematics 20 Online
OpenStudy (anonymous):

Find the average rate of change of f(x)=2x^2-7x from ×=2 to x=5

OpenStudy (xapproachesinfinity):

hey missroc

OpenStudy (xapproachesinfinity):

average rate of change is the slope you know

OpenStudy (xapproachesinfinity):

how do find slope?

OpenStudy (anonymous):

Rise over run

OpenStudy (xapproachesinfinity):

yes so \[\frac{\Delta y}{\Deltax}\]

OpenStudy (xapproachesinfinity):

change in y over change in x

OpenStudy (anonymous):

Y =8 if x=2

OpenStudy (anonymous):

Oh i forgot -7x

OpenStudy (xapproachesinfinity):

good

OpenStudy (anonymous):

Y=15 if x=5

OpenStudy (xapproachesinfinity):

sorry the website is slow

OpenStudy (anonymous):

Y=-6 if x=2

OpenStudy (xapproachesinfinity):

finally the website is good now yes so 15-(-6)/5-2

OpenStudy (anonymous):

-30

OpenStudy (anonymous):

7

OpenStudy (xapproachesinfinity):

yes that is the avg rate of change

OpenStudy (anonymous):

Thanks!

OpenStudy (xapproachesinfinity):

no problem

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