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Read 99 items
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Residual standard error: 0.1154 on 97 degrees of freedom
Multiple R-Squared: 0.979,    Adjusted R-squared: 0.9787 
F-statistic:  4512 on 1 and 97 DF,  p-value: < 2.2e-16

sub estimate_count_from_xp($) {
    my $xp = shift;
    10 ** ( 4.195 - 0.2727 * $xp );
}