How long does a bean plant live for?

I did a project 4 the science fair on bean plants. I wanted to know the life span of a bean plant 4 my project. I found it odd that out of all of the info on the internet that it could not answer 1 stupid question! On 1 of the sites i went on it said that they live 4 three months. (I am talking about the type of bean plants that u sometimes grow in like grade 1) I will update this answer after my beans die so i know how long they lived 4. Sorry if u needed to know right away, do some more research :)

newtest3