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25 March, 14:03

In 2000, 54% of the residents in a large city regularly used newspapers for getting news and this has decreased at an average rate of approximately

1.7 % per year since then. Find a linear function in slope-intercept form that models this description. The function should model the percentage of residents,

Upper P left parenthesis x right parenthesis comma

P (x), who regularly used the news outlet x years after 2000

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  1. 25 March, 14:23
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    X=number of years after 2000.

    y=percentage of residents (still) reads newspapers for information

    initial value ( = y-intercept) = percentage in 2000 = 54%

    slope = increase each year = - 1.7% (because it is a decrease)

    the slope intercept form of the equation is therefore:

    y=slope (x) + initial value, or

    y=-1.7x+54 (in %)
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