2x^2+12x-14=0 by completing the square

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Which table shows a proportional relationship between miles traveled and gas used?