Question 1181987
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This problem was just posted to the forum one or two days ago,  and I just answered once.



I repeat my answer here  AGAIN.



Average rate of change =   {{{(h(8) - h(4))/(8-4)}}}.



Determine  h(8)  and  h(4)  from the plot and use this formula.



What is unclear to you from this explanation ?



If something is still unclear to you,  it means that you are in wrong class.