She could very well be a pure American Pitbull Terrier, however usually the term 'Pit bull' is applied to a variety of breeds. My Staffordshire Bull Terrier is considered a 'Pit bull' for example.
As for her behavior, I would suggest getting a long line(Or training leash) so that way when she's outside you're able to redirect her and control her by using the leash. Such as grabbing the leash and saying 'Lets go' and taking her a short distance to do something else. In example, play fetch. Another thing you can do when she jumps is cross your arms and turn your back. Most times dogs learn that jumping = humans giving attention. Even if its us pushing them away, and they use it to manipulate us to give them attention.
As for her behavior, I would suggest getting a long line(Or training leash) so that way when she's outside you're able to redirect her and control her by using the leash. Such as grabbing the leash and saying 'Lets go' and taking her a short distance to do something else. In example, play fetch. Another thing you can do when she jumps is cross your arms and turn your back. Most times dogs learn that jumping = humans giving attention. Even if its us pushing them away, and they use it to manipulate us to give them attention.