If you want to find the formula through two points like the points below (after hitting select points)
What you are doing then is to divide the two equations:To practice recognizing exponential functions there are two points on the graph below. Select the correct base (b) from the list to the right. If you get it wrong it shows you what the wrong slope looks like. If you get it right it gives you a new problem.
You can also play this in game mode by hitting start game. If you get the function right on the first try you will get 3 points. If it takes 2 tries you get 2 points and so on. You have 2 minutes to get the most points you can.
Copyright David B. Sher 2014