document.write( "Question 1029681: what is the average rate of change, in millimeters per year, of a persons pupil diameter from age 20 to 80? where 20 year olds are 4.7 millimeters per year and 80 year olds are 2.3 millimeters per year \n" ); document.write( "

Algebra.Com's Answer #644641 by fractalier(6550) $\"\"$ $\"About$

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Average rate of change = (change in pupil diameter)/(change in age) =
\n" ); document.write( "(2.3 mm - 4.7 mm)/(80 - 20) = -2.4 mm / 60 years = -0.04 mm/yr
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