Question

The Air Quality Index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the air. Over 100 is “Unhealthy”.The number of days the AQI exceeds 100 in a given year is modeled by the following quadratic regression equation:n = 1.76 t squared minus 13.32 t + 41.00Let n represent the number of days the AQI exceeds 100 in a given year. Approximately how many days did the AQI exceed 100 in the year 1988? Round to the nearest whole day.(Let t represent the number of years since 1990. Therefore, t = 0 corresponds to the year 1990.)a.60 days.75 days.61 days.21 days

Answer 1

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