S.
Are you sure that a teenager would know what to do at 7 weeks. I would Never let a teenager watch my infant but I just needed to put my 2 cents in cause you never know if an emergency came up, etc..
I used to watch 3-5 yrs old when I was 14 and would get paid $4 an hr.
It just depends on their responibilties and how many children also the rates have gone up through out the years they charge anywhere from $8-10 an hour but I think it's too risky to let a young teenager to watch a newborn.