Decomposed Graph
This shows 3 features:
1) The Time Series Plot (you have already
discussed the Raw Data AND the Trend!)
2) Seasonal effects
3) Residuals
millions of litres
Now, get your decomposed graph for Visitors to NZ
Seasonal effects seasonal variat

13. EQUATIONS AND IDENTITIES 2, Factorj'ze the following:
EXERCISE 13A Meaning ofldentities
(a) 2x2 w 8
1. State whether the foifowing retations are an equation or . 2
. . (b) 3.3 27'
an Identity. 2
(a) x“—i=(x—I)(x+1){x3+1) (0)83 ~3
(b) X2+2X+3=4x
(c) 2(

9. Make p the subject of the formula xjp + 1) = M
8. USE OF FORMULAE
1‘ Subject of Formulae
ke h the subject of the formula.
EXERCISE 8A Change 0
1. H 721: 6(1) + C), express 317a in terms of b and c. 10' Ma E2 1_ k
x - r - - T = me2 1 + h 1
2 In the form

12. SIMULTANEOUS LINEAR EQUATIONS IN TWO UNKNOWNS
EXERCISE 12A Revision of Linear Equations in one unknown
1- Solve the foﬁowing equations: 3. If 2;: — 1 is a factor of 4x2+ kx — 1, than k =
(1) 1—73- 1»% (2) 1343213 4. Ifx+3isafactorofx2+6x+k,thenk=
2 9

d the amount at simple inte-
12. Find the simple interest an
rest of $23000 for 2 years at 12% pa.
1 is $500 the simple interest at 15% p.21.
11. USING PERCENTAGE
EXERCISE 11A Profit and Loss
1. Find the simple interest rate for a sum to three times i

Symptoms:
Pollution - With mounting evidence that diesel exhaust poses major health hazards,
Diesel-powered vehicles and equipment account for nearly half of all nitrogen oxides
(NOx), reducing diesel pollution has become a public priority.(according to U

Optimise
Department of
Information Systems
Operations Management
Create Wealth
Generate Value
Innovate
Watch: Steve Jobs' 2005 Stanford Commencement Address https:/youtu.be/UF8uR6Z6KLc
Sustain
Read: Course overview in the Course Book
Transform
Learning Ou