Graphing

Hello everyone, what i am doing is graphing a velocity vs time graph. One of my points is (1.26, 0.5) and another is (1.02, 0.4), from a separate data set, now when i try to graph these onto excel it completely drops the x-value of my point and graphs only the y-value. I desperately need help with this! thank you.

Are you using a scatter plot? How are you trying to add the second series? What do you mean that it drops the x-value? Does it plot them in the correct place, but "erases" the x-axis, or does it plot them in the wrong place?