Solve for y in terms of x to find most of the x & y pairs.
-----which is how you find most of the y values for any x you pick.
Table starts like this (but here without the separator lines being shown):
x y=-(2/7)x+5/7
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0 find y
pick x find y
find x 0
1 find y
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YOU pick some value in each slot and find the corresponding value of the other variable. You do this!