Eric Nicholas K's answer to idununderstandasinglething's Secondary 3 A Maths Singapore question.
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Date Posted:
4 years ago
Sorry, forgot to add that when x = 0, regardless of the value of m in mx + 30, the value will be 30. This is why all lines with equation y = mx + 30 will pass through (0, 30). This is why I set (0, 30) as the reference point for the lines to be freely rotated about.
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