nTo graph data entered into directly into Excel, open Excel and a blank spread sheet will be shown
nEnter data into the cells with your x-axis on the far left and the y-axis on the right. To move between cells, you may use the Enter key or the arrow keys.
nIn this case, the x-axis is 2, 1.5, 1, 0.5; and the y-axis is 3 ,5 ,7, 9.