Review the table of values showing the number of days each year from 1990 to 1997 that air quality in San
Diego did not meet federal air quality standards.
Which phrase best describes the regression model for
the data?
Years since 1989
Number of Days
power model; y = 41.217-0.86
O exponential model, y = 54.97(0.71)*
O logarithmic model; y = 39.14 – 17.93 In x
quadratic model; y = 0.60x2 - 10.38x + 46.73
1
39
2.
27
3
19
4
14
5
9
6
12
7
2
8
1