Why are my plotted graphs coming out different?

Currently doing a chemistry report. For my x-axis I want to have cells B3,B4,B5,B6, with the axis title called 1/K, and my y-axis to have D3,D4,D5,D6 with axis title ln(Kx). But when I highlight these cells and click insert Line with markers chart is shows me 2 separate lines one for 1/k and another for ln(kx), but I just want 1 single line, I did this in the past with another line chart in which I used Time and Temperature and got a single line but now doing the same thing this happens. Any help?