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(0,5) and (4,3125)

 

 

I know we use y=ab^x but my mind goes blank after that. 

Guest Apr 8, 2017
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 #1
avatar+77081 
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Yep.....you have the correct function

 

Note, when x = 0, y = 5....so we have

 

5  = ab^(0)  =  a

 

So, since b^(0) = 1,  then.....a = 5

 

And we know that

 

3125 = 5b^(4)    divide both sides by 5

 

625  = b^4         take the 4th root of both sdes and we have

 

625^(1/4)  = b    =   5

 

So.....our function is

 

y = 5*5^(x)

 

 

cool cool cool

CPhill  Apr 8, 2017
edited by CPhill  Apr 8, 2017

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