Mathematics for IGCSE & O level - Coordinate Geometry (Section 1 - No. 11)
Which of the following equations represents a line parallel to the line y = 2x + 5?
y = -2x + 5
y = 0.5x + 5
y = 2x - 3
y = -0.5x + 5
解释
Parallel lines have the same gradient. The given line has a gradient of 2, so a parallel line must also have a gradient of 2.