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Question
a tire company wants to know how quickly the tread on its tires wears down with average use. have x represent the number of months the tires was used and have y represent the thickness of the tire tread, in millimeters. the equation for the line of best fit is: y = -3/7x + 20. what is the slope? what is the y - intercept? what does it represent? myriam was told that after 21 months, she will need to replace the tires because the tread will be too thin. after 20 months, how many millimeters thick will her tire tread be? after 49 months, how much tread is left? what does this mean? this table shows the value of this toyota celica after 5 years. x: 0 1 2 3 4 y (in thousands): 21 18 15 12 9 what is the equation for a line of best fit? what does it represent? when the car is 5 years old, how much does it worth? when the car is worth about $19,500, how old is the car (in months)? will your equation remain a good model to predict the value of a computer when it is 9 years old? use mathematics to justify your answer.
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