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. . . Given the following quadratic regression equation, estimate the number of days the AQI exceeded 100 in the year 1988. . . n = 1.76t^2 - 13.32t + 41.00. (let t represent the number of years since 1990. therefore, t = 0 corresponds the year 1990. round to the nearest whole day.). . A. 60 days. B. 75 days. C. 61 days. D. 21 days

Answer 1

b. 75 days

Explanation:

Answer 2

There are several information's already given in the question. The answer to the question can be easily deduced using those given information's.

From the given question we come to know that
t = -2
Then
n = 1.76t^2 - 13.32t + 41.00
= [1.76 * (-2)^2] - [13.32 * (-2) + 41
= 7.04 - ( - 26.64) + 41
= 7.04 + 26.64 + 41
= 74.68
= 75
From the above deduction, we can conclude that the correct option among all the options that are given in the question is the second option or option "B".