S4_Foundation_Proportion_MIA

13 feb 2012 created by mr lafferty maths dept scales

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Unformatted text preview: thsrevision.com 47 Scales and Models S4 Example : www.mathsrevision.com A model car is 10cm long. The real length of the car is 300cm. What is the scale of the model. Answer : 300 10 = 30 Scale is 1 to 30 Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com 48 Scales and Models S4 www.mathsrevision.com Now try Ex 7.2 Ch 2 (page 32) Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com 49 Starter Questions S4 1. 18. 7 + 12. 9 www.mathsrevision.com 2 . C a lc ula t e 3 0 % o f 4 0 3. W hat is t he best buy 5 bot t les of wat er f or 3. 50 or 4 cans 2. 88 Explain your answer . 13 Feb 2012 Created by Mr. Lafferty Maths Dept. Proportion graphs S4 Learning Intention Success Criteria 1. To be able to identify a proportion graph. 2. Use graph to solve problems. www.mathsrevision.com 1. To explain the main features of a proportion graph and used it to solve problems. 13 Feb 2012 Created by Mr. Lafferty Maths Dept. S4 How much petrol do How far can I travel I need to travel 80 with 6 litres of petrol km. A proportion graph is always a straight line graph through the origin Proportion graphs 200 180 160 140 120 100 80 60 40 20 0 0 1 2 3 4 5 6 7 8 120km 1 minute to come up with a question 4 litres 9 10 ) m K ( e c n a t s i D Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com Pe t r o l Lit r e s 52 S4 How Euros for How many Pounds 80 for 25 140 120 100 Proportion graphs 80 60 40 20 0 0 s o r u E 100 20 20 40 60 80 100 Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com Po und s 53 Proportion graphs S4 www.mathsrevision.com Now try Ex 8.1 Ch 2 (page 34) Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com 54...
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