Answer:
<em>y = 3x + 5</em>
Step-by-step explanation:
y = mx + b (slope-intercept form)
(
,
)
(
,
)
Slope m =
y -
= m( x -
) (point-slope form of linear equation)
~~~~~~~~~~~~~~~
By definition, the number
is the ratio between the circumference and the diameter:

This implies that

And so your circumference is 
Julies lives 2.89 kilometers more from the mall than Taylor.