Mathematics for IGCSE & O level - Coordinate Geometry (Section 1 - No. 13)
Given the points A(1, 5) and B(4, 2), select the correct statements.
The gradient of AB is -1.
The length of AB is 3
The midpoint of AB is (2.5, 3.5).
The equation of AB is y=-x+6
설명
Gradient: (2-5)/(4-1) = -1, Length: √((4-1)^2 + (2-5)^2) = √18, midpoint: (2.5, 3.5) & Equation: y-5= -1(x-1) or y=-x+6