To create a crossword puzzle

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