I am trying to make a line graph with 2 lines, each with its own separate
x-axis and y-axis values. I've tried but cannot seem to do this. Any help
would be great.

50 50 55 45
25 25 32 23
12.5 12.5 17 15
6.25 6.25 9 8
3.125 3.125 6 3
1.5625 1.5625 3 3
0.78125 0.78125 1 2

These are the two lines I'm trying to graph, with the x-axis being on the
left and the y-axis on the right.