Question

How do I identify an exponential growth/decay function on a graph? I'm assuming that if the curve moves from left to right, upwards, it is growth, and if it moves left to right, downwards, then it is decay. Please tell me whether this reasoning is right or wrong.

Answer 1

basically correct

Though that may not guarantee that the curve is exponential. Given that assumption, your reasoning is correct.

Answer 2

yes, you are correct

example of exponential growth graph
http://www.wolframalpha.com/input/?i=plot+y+%3D+2%5Ex

example of exponential decay graph
http://www.wolframalpha.com/input/?i=plot+y+%3D+%281%2F2%29%5Ex

Answer 3

Thanks!