SOLUTION: Write an exponential function whose graph passes through each pair of points for: (1,5)(2,7)

Question 880493: Write an exponential function whose graph passes through each pair of points for: (1,5)(2,7)
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Write an exponential function whose graph passes through each pair of points for: (1,5)(2,7)
Using the exponential function: f(x) = a^x,
Find a relationship
=
Cancel a
=
5a = 7
a = 7/5
a = 1.4
Find what exponent of 1.4 will give you 5
1.4^x = 5
x =
x = 4.78327
:
Write an equation from this

using a calc
when x=1; f(x) = 5
when x=2, f(x) = 7
:

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