Plot the points (2, 8), (7, 8) and (12, 8). Join these points in pairs.

Take a point O on the graph paper and draw the horizontal and vertical lines OX and OY respectively.

Then, let on the x-axis and y axis 1 cm represents 1 unit.

In order to plot point (2, 8), we start from the origin O and move 8 cm along OX. The point we arrive at is (2, 8).

To plot point (7, 8), we move 7 cm along OX and 8 cm along OY. The point we arrive at is (7, 8).

To plot point (12, 8), we move 12 cm along OX and 8 cm along OY. The point we arrive at is (12,8).

From the graph below, it can be seen that the points lie on a line parallel to x-axis because they have the same y-coordinate.