Um, the picture is kind of blurry otherwise I can help since I am pretty good with this...
You would have to divide 25 by 4. You would get 6.25. That means that Melinda can babysit for 6 hours.
1) not function because 6 number repeat in domain
2) Function
For 3 and 4 I guess it's
3) Function
4)not function
If any number repeat twice in the domain that will be not a function
Since the scale factor is greater than 1, this dilation will be an enlargement. Therefore, you multiply 7.2 times 8.1 to get 58.32. This question asks for diameter, so multiply 58.32 times 2 to get 116.64 in.
