She does look very basenji - and behaves more like a basenji, than anything else. She is spot on 20 lbs - which seems maybe a bit small if she was mixed with whippet (?) She was described as basenji/whippet x by the pound but I once had a german shepherd puppy that the pound called a terrier x, so I think sometimes it is best guess based on what the dog looked like to someone at the moment.
She is longer than a basenji with a long straight tail and the ears are wide set and huge which may not be showing in the original pictures. Here are some other pictures that show her ears and more of her body.
I am not positive about the lure coursing as it is hard to know what will take her interest. Or if interested once, she may not do it again! Plus - she is not purebred - not sure if that matters.