Q.4 If A(1, 2) and m = 2, then the equation of line is...
O 2x - y = 4
O 2x - y = 0
O 2x + y = 0
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given: A (1, 2) , slope m = 2
to find equation of the line
we can use point - slope form
equation used : (y - y1) = m (x - x1)
=> y - 2 = 2(x - 1)
=> y - 2 = 2x - 2
=> y - 2 - 2x + 2 = 0
=> y - 2x = 0
=> 2x - y = 0 [ multiply both sides by -1 ]
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