To create a crossword puzzle

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Across
  1. 3. when is a system of linear equations called inconsistent
  2. 6. if a1/a2=b1/b2=c1/c2 then what does the system of linear equations represent graphically
  3. 7. is it true to say that the pair of equations x+2y-3=0 and 3x+6y-9=0 is dependant
Down
  1. 1. line what does a linear equation in two variables represent geometrically
  2. 2. if the lines corresponding to two linear equations are coincident, what can you say about the solution of the system of given equations
  3. 4. solution define consistent system of linear equations
  4. 5. do the equations x+2y-7=0 and 2x+4y+5=0 represent a pair of parallel lines