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Mathematics for IGCSE & O level - Coordinate Geometry (Section 3 - No. 21)
What is the gradient of the line described by the equation x + 2y = 4?
1/2
-1/2
2
-2
解释
Rewrite in slope intercept form (y=mx+c): 2y = -x + 4 => y = -1/2 x + 2
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