SOLUTION: I need help with this question: find an exponential function going through the points (3,54) and (4,162). Then write your function as a base of e. I do not know how to find the fun

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: I need help with this question: find an exponential function going through the points (3,54) and (4,162). Then write your function as a base of e. I do not know how to find the fun      Log On


   



Question 716002: I need help with this question: find an exponential function going through the points (3,54) and (4,162). Then write your function as a base of e. I do not know how to find the function, or how to write it with base e.
I attempted this problem by solving for a=33.72 and b=1.17 , but I do not know if that is right.
I came to have the function y=33.72 (1.17)^x and the base of e function to be f(t)=33.72e^1.17t

Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
The key to solving this is to try to factor each of the y coordinates. See how they relate to the x coordinates. To be thorough, find the complete prime factorization of y coordinate of each point.

54=2%2A3%5E3, and 162=2%2A3%5E4

You see a base of 3. The 2 is working as a coefficient. Now recheck the points using the complete factorizations of y.
(3,2%2A3%5E3) and (4,2%2A3%5E4).
Each point is found according to a formula, (x, +2%2A3%5Ex).

That should be all you need to continue and finish solving the problem.
(Obvious now is the function is f%28x%29=2%2A3%5Ex ).