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Test case
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Write x1: 3
Write y1: 0
Write x2: 0 
Write y2: -7
Equation of the line joinig the two points is 7.000000X+(-3.000000)Y+(-21.000000)=0
The distance of the line from the origin is 2.757435
Mirror image of the origin with respect to the line is (5.068965,-2.172414)
Write x3: 30
Write y3: 63
The point (30.000000,63.000000) lies on the straight line
Mirror image of (30.000000,63.000000) with respect to the line is (30.000000,63.000000)

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Grading policy:
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1.5 marks each for correct output of each step (total 17.5 marks)
2 marks for logical correctness of each method (total 10 marks)
2.5 marks for indentation and comments (total 2.5 marks)

Total marks: 20
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