I am trying to figure out the equation of an exponential graph from two given points.
I know you have to plug each set of points into the equation, but I forget exactly how to solve this.
As stated in the question, the equation for the graph is y=a^x +b
Fist set of points: (2,5)
set of points with y intercept: (0,-4)
Thank you all.
Best Answer
As you have said, just put the points into the equation: \begin{align} 5 & = a^2 + b \\ -4 & = a^0 + b \end{align}
The second equation directly gives you the first value you need, inserted into the first equation you can easily calculate $a$.