Mathematics for IGCSE & O level - Coordinate Geometry (Section 1 - No. 6)
Determine the equation of the line that passes through the point (1, 3) and has a slope of -1.
y = -x + 2
y = x + 4
y = -x + 4
y = x + 2
คำอธิบาย
Use point-slope form: y - 3 = -1(x - 1) => y = -x + 4.