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Published byBarbra Chambers Modified over 8 years ago
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You will compare the prices of two companies that provide the same service and decide when you get a better deal.
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Pick a service to research prices Plumber Taxi Carpet cleaner Rent a machine Other idea get approved by Mrs. Anderson Talk to two different companies that perform this service. Get there prices and record the name of who you talked to.
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John Smith Plumbing This company charges a $50 service fee and $25 per hour while they are working on the plumbing. John Smith 888.888.8888 All Day Plumbing This company has no service fee and charges $35 per hour while they are working on the plumbing. George Day 999.999.9999
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WRITE AN EQUATION FOR EACH COMPANY EXPLAIN THE SLOPE AND Y-INTERCEPT AND WHAT THEY MEAN John Smith Plumbing y=25x+50 The slope is $25, for each hour of work the cost is $25. The y-intercept is $50, the fee just to come and look at the problem is $50. All Day Plumbing y=35x The slope is $35, for each hour of work the cost is $35. The y-intercept is 0, this means they do not charge a fee for coming to my house
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Graph the equations on one graph Label each line with the company name Label the point where the two graphs intersect. Label where you get a better deal.
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SOLVE WITH ELIMINATION SOLVE WITH SUBSTITUTION Show work
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