S4_General_Proportion_TJ_Chapter2

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Unformatted text preview: www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com Rate and Proportion Rate and Proportion www.mathsrevision.com Rates and Finding Rates Monday, February 13, 2012 Monday, February 13, 2012 1 Direct Proportion S4 Direct Proportion graphs Inverse Proportion www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com Starter Questions Starter Questions www.mathsrevision.com S4 72 of 8 1 4. pay. weekly total my is What hour. per 8 is pay of rate my and week a hours 20 work I 3. 2.35 (b) 1.24 (a) place decimal 1 to Round 2. 140 of 5% Find 1. Monday, February 13, 2012 Monday, February 13, 2012 2 www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com www.mathsrevision.com Learning Intention Learning Intention Success Criteria Success Criteria 1. 1. To understand the term rate and To understand the term rate and calculate it. calculate it. 1. To explain the term rate is and how to find the rate. Rates S4 Monday, February 13, 2012 Monday, February 13, 2012 3 Monday, February 13, 2012 Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com www.mathsrevision.com 4 4 Per means for each. A phrase that contains the word per is called a RATE. Example : Sean walks at 5 km per hour (km/hr) This means that if Sean walked at this speed for one hour he would travel 5km. Rates Rates S4 www.mathsrevision.com www.mathsrevision.com We are often interested in rates Miles per gallon Goals per game s spent per day Calories per day Words per minute Rates Why are we interested in rates? www.mathsrevision.com S4 Monday, February 13, 2012 Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com www.mathsrevision.com 6 6 Example : Sean walks at 5 km per hour (km/hr) How far would he walk in : (a) 4 hours (b) Half an hour (a) 4 x 5 = (b) 5 x 0.5 = 20km 2.5 km Rates Rates S4 Monday, February 13, 2012 Monday, February 13, 2012 Created by Mr. Lafferty @www.mathsrevision.com Created by Mr. Lafferty @www.mathsrevision.com www.mathsrevision.com 7 7 Finding the Rate Example : For 5 hours work Jennifer is paid 30....
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## This note was uploaded on 02/13/2012 for the course MATH 115 115 taught by Professor Jones during the Spring '10 term at University of Phoenix.

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S4_General_Proportion_TJ_Chapter2 - www.mathsrevision.com...

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