I am trying to create a line chart with 2 lines alongs the same axis

the numbers are as follows y axis xaxis
series 1
series 2
3 185
20
3.5 165
50
4 145
80

there are more, but as long as I can do these I should be fine...when I try,
I cannot get teh y axis to be these numbers and the x axis are just 1 2 3 4 5
6 7 for each data point added...I know this is a long question....but any
help will be greatly appreciated...thanks