Roger is trying to prove or disprove that a quadrilateral in a coordinate plane is a parallelogram. Which strategy can Roger use
2 answers:
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now.. to graph that
let us make a quick table
so.. you can either plot those points there on the table,
or just bear in mind x = 4, no matter what "y" is,
namely, x = 4 is just a vertical line at x = 4 :)