Mathematics for IGCSE & O level - Coordinate Geometry (Section 2 - No. 14)
If a line passes through (0, 4) and has a gradient of 2, what is the equation of the line?
y = 4x + 2
y = 2x + 4
y = 2x - 4
y = 4x - 2
설명
Using slope-intercept form: y = mx + c. The y-intercept is 4, and the gradient is 2, so y = 2x + 4