(0,5) and (4,3125)

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

Guest Apr 8, 2017

#1**+2 **

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)

CPhill
Apr 8, 2017