Mathematics for IGCSE & O level - Coordinate Geometry (Section 2 - No. 3)
If line A has equation y = 3x - 2, which lines are parallel to line A?
y = 3x + 5
y = -3x + 2
y = 3x - 7
y = (1/3)x + 1
Explanation
Parallel lines have the same gradient. The gradient of line A is 3.
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