# algebra

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The Environmental Protection
Agency (EPA) monitors air quality in U.S. cities.
The function f gives the annual number of days with
unhealthy air quality in Los Angeles, California, for
selected years.

X: 1995 1997 1999 2000 2003
f(x):113 60 56 87 88

(a) Find F(1995)and interpret your result.
(b) Identify the domain and range of f.

• algebra -

from your chart, F(1995) = 113

domain: {1995,1997,1999,2000,2003}
range: {113,60,56,87,88}

Domain is the set of x values
range: the set of y values.

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