Mathematics for IGCSE & O level - Coordinate Geometry (Section 4 - No. 14)
Which equation represents a line parallel to y = 4x - 7?
y = -4x - 7
y = 4x + 2
y = (1/4)x - 7
x + 4y = 7
解释
Parallel lines have the same gradient. The gradient of y = 4x - 7 is 4.