The exponential function is of the form:
Given the two points, we can plug each point into the equation and see:
1.
2.
Let's divide the the 2nd equation by the 1st one:
Note: we used the property of exponents, 1/a^x = a^ -x to simplify it.
Now, we can solve for b:
The second equation, now, becomes:
Now, we can easily find a:
We know b = 2 and a = 3.
So, the final equation will be: