Mathematics for IGCSE & O level - Coordinate Geometry (Section 1 - No. 16)
The gradient of a line is calculated using which formula given two points (x1, y1) and (x2, y2)?
(x2 - x1) / (y2 - y1)
(y2 - y1) / (x2 - x1)
(x1 - x2) / (y2 - y1)
(y1 - y2) / (x1 - x2)
Обяснение
Gradient = (Change in y) / (Change in x) = (y2 - y1) / (x2 - x1)