Question 763262
They are saying that the ratio {{{ D/P = 11/200 }}} is 
the linear rate that {{{ D }}} is increasing
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Plot {{{ D }}} on the vertical axis and
plot {{{ P }}} on the horizontal axis
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Using this plan, you are given the point ( 20000, 2500 )
Now you can write the general point-slope formula:
{{{ ( D - 2500 ) / ( P - 20000 ) = 11/200 }}}
Multiply both sides by {{{ 200*( P - 20000 ) }}}
{{{ 200*( D - 2500 ) = 11*( P - 20000 ) }}}
{{{ 200D - 500000 = 11P - 220000 }}}
{{{ 200D = 11P + 280000 }}}
{{{ D = ( 11/200 )*P + 1400 }}}
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The vertical intercept is at {{{ P = 0 }}} and
{{{ D = 1400 }}}
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This says that when there were no people, they still
issued dog licenses
I think what this says is that there were more dogs than people
until {{{ P = D }}} when the population caught up with the number of dogs
If I say {{{ P = D }}} then,
{{{ P = ( 11/200 )*P + 1400 }}}
{{{ P*( 200/200 - 11/200 ) = 1400 }}}
{{{ ( 189/200 )*P = 1400 }}}
{{{ P = ( 200/189 )*1400 }}}
{{{ P = 1481 }}} is when dog licenses issued
equals population