Question

For a few months, Dexter recorded the amounts, in fluid ounces, of laundry detergent remaining y after he and his family washed x loads of laundry. The equation of the line of best fit for his data is shown below. y = -1.6x + 50 Which statement correctly describes the slope of Dexter’s equation of the line of best fit in the context of the situation? A. The bottle Dexter’s family buys holds about 50 fluid ounces of detergent. B. For each load of laundry, Dexter’s family used about 1.6 fluid ounces of detergent. C. With 50 fluid ounces of detergent, Dexter’s family can wash about 1.6 loads of laundry. D. With 1.6 bottles of laundry detergent, Dexter’s family can wash about 50 loads of laundry.

Answer 1

Definitely it's B:  The amt of detergent left after x loads have been washed is y = (-$1.60/load)x + 50.