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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17. If you were told the number of units used vs. the total <strong>bill</strong> was represented by alinear graph y=0.17x+10. What does that tell you about the st<strong>an</strong>ding charge <strong>an</strong>d costper unit?__________________________________________________________________________________________________________________________________________18. Describe what happens to the line in the interactive file if the cost of the st<strong>an</strong>dingcharge for a household is increased.__________________________________________________________________________________________________________________________________________19. Describe what happens to the line in the interactive file if the cost per unit isincreased.__________________________________________________________________________________________________________________________________________20.a. Describe the cost of the <strong>bill</strong> Household A receives <strong>an</strong>d the <strong>bill</strong> Household Breceives in the diagram below.b. Write down <strong>an</strong>d then graph a situation where a household has a higherst<strong>an</strong>ding charge th<strong>an</strong> household A in the diagram above but ends up with a<strong>bill</strong> which is below Households A’s <strong>bill</strong> after a certain number of units. Draw arough sketch of this situation.__________________________________________________________________________________________________________________________________________Draft 01 © <strong>Project</strong> <strong>Maths</strong> Development Team 2011 <strong>ESB</strong> <strong>bill</strong> Page 8 of 8