C1: Chapter 5 Coordinate Geometry Dr J Frost Last modified: 30 th September 2013

x y A B C D E F G H

x y

Revision ?? ?? ? ? ? ?

Equation of a line given a point and gradient x y This is one and only formula you need this chapter, and you MUST remember it. Where do you think this comes from? 

Gradient using two points Point 1 Gradient (0,0)(2,6)3 (1,3)(3,7)2 (0,5)(4,25)5 (2,2)(-1,5) Q1 Q2 Q3 Q4 (4,3)(10,6)0.5Q5 (7,8)(-4,-3)1Q6 (7,1)(-1,5)-0.5Q7 (6,5)(8,1)-2Q8 ? ? ? ? ? ? ? ? ?

Quickfire Examples Point 1GradientUnsimplified Equation (3,4)2 (-5,0) (1,-3)4 (4,7)3 Q1 Q2 Q3 Q4 (-3,-2)5Q5 ? ? ? ? ?

Examples ? ? ? Q1 Q2 Q3

Perpendicular Lines GradientGradient of Perpendicular Line 2-1/2 -31/3 1/ /5 -2/77/2 7/5-5/7 ? ? ? ? ? ? ?

Example Problems ? ? ? Q1 Q2 Q3

Checking your understanding Edexcel May 2013 (Retracted) ? ?

Checking your understanding Edexcel Jan 2013 ? ? ?

Exercises C1 Page 78 (Old Textbook) Mixed Exercise 5F Q1 onwards.