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Student Activity: To investigate an ESB bill - Project Maths

Student Activity: To investigate an ESB bill - Project Maths

Student Activity: To investigate an ESB bill - Project Maths

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. Draw a rough graph to represent the situation where the st<strong>an</strong>ding charge forelectricity is €0 <strong>an</strong>d the price per unit is €0.10.a. What is the formula that represents the situation where the st<strong>an</strong>ding chargefor electricity is €0 <strong>an</strong>d the price per unit is €0.10?_____________________________________________________________________15. Jonath<strong>an</strong> forgot to pay his <strong>ESB</strong> <strong>bill</strong> for the last <strong>bill</strong>ing period <strong>an</strong>d he used 200 unitsthis period. The st<strong>an</strong>ding charge is €21 per 2 month period <strong>an</strong>d the cost per unit is€0.10. If the <strong>bill</strong> for the 4 month period was €300, how m<strong>an</strong>y units did he use in thefirst 2 months assuming the charges remain the same? Show your calculations.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________16. If the <strong>ESB</strong> ab<strong>an</strong>doned its st<strong>an</strong>ding charge, but the amount of a household’s <strong>bill</strong> didnot increase, what 2 things could have happened?__________________________________________________________________________________________________________________________________________Draft 01 © <strong>Project</strong> <strong>Maths</strong> Development Team 2011 <strong>ESB</strong> <strong>bill</strong> Page 7 of 8

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