For expressing the corresponding values of x and y, <em>any ordering will do</em>. It is usually convenient for the user of the table if there is some recognizable order (so that a value can be found without searching the entire table). The usual expected order is by x-value, smallest to largest.
Some problem statements may specify that the table entries be listed in order. In those cases, yes, the <em>table values must be listed as specified</em>. (This accounts for the (maybe) answer, above.)
