The area(in square feet) of a rectangular rug can be represented by 6x^2+7x+2 write the expressions that repellents the dimensions of the rug

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Need the graph to answer this.