Just put a closed circle above 5 on the # line.
The answer is positive because its is going in the positive column
B.) thousandths because the first one is tenths and the second is hundredths. Also because it is after the decimal
I think to find the y - axis you should sub x=0
Therefore, y=5(0)+2
=2
Hence the answer is (0,2)
I'm sorry if this is wrong!