(6,3) Is the answer________________
We want the final coordinate of K to become (-3,1). If you reflect across the y-axis, you transform

So, we need to move K to (3,1), and then reflect it across the y-axis. Since K starts at (-1,4), we have to move it 4 units to the right and 3 units down.
18 hours = 18/24 reduces to 3/4 of a day
3/4 = 0.75
so 3600/3.75 = 960 watts per day