Determine whether DFGH is a rectangle given each set of vertices. Justify your answer. 1) D (9,-1), F (9,5), G (-6, 5), H (-6,1). 2) D (6,2), F (8,-1), G (10,6), H (12,3).
3) D (-4,-3), F (-5,8), G (6,9), H (7,-2).

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answer: it actually depends on which is the independent variable and which is the dependent variable. let us say we're looking at a linear equation. y=2x+3. we theoretically could switch the equation to be x=(y-3)/2 and it would be the same line. so either a causes b or it can be that b causes a. so technically the answer is false

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