Presentation Transcript
Slide 1:Welcome to
GRAPHS!
(AS 2.2)
Slide 2:Last year for graphs (mostly achieved) (tended to be
Merit/Excellence)
Slide 3:THIS year.... Its own topic
(Co-ordinate Geometry) Mostly at
achieved level
Slide 4:Equation types unfactorised, but simple
Slide 5:Equation types PARTIALLY factorised
Slide 6:Equation types FULLY factorised e.g. y = (x+2)(x-4)
Slide 7:Equation types UN-factorised
Slide 8:What do
you do?
Slide 9:Firstly, know how to
sketch the basic shape.
Slide 10:Equation types unfactorised, but simple Draw the basic shape. Vertex will just be higher or lower.
Slide 12:Equation types unfactorised, but simple Draw the basic shape. Multiply the vertical distances by 3
Slide 14:Equation types PARTIALLY factorised Draw the basic shape Use your knowledge of TRANSFORMATIONS to know where to put the vertex.
Slide 16:Equation types FULLY factorised Find the x intercepts (what makes y = 0) Find the vertex (halfway between x int.) Find the y intercept (by substituting x = 0) e.g. y = (x+2)(x-4)
Slide 17:y = (x+2)(x-4)
Slide 18:Equation types UN-factorised Factorise Or partially factorise (by completing the square)
Slide 19:If in doubt... Make a table
and plot the
points!