3400
Step-by-step explanation:
3600-120=3480,3480+80=3560
With a little algebraic manipulation we can solve for pi...
d-c / pi
we want to get pi by itself so first we multiply both sides by pi to get it out of the denominator...
pi × (d-c) = pi / pi
pi × (d-c) = 1
Now get pi by itself by dividing both sides by d-c...
pi × (d-c) / d-c = 1 / d-c
simplify
pi × 1 = 1 / d-c
pi = 1 / d-c
Done!
The slope is 2/3
Hope I helped!
Let me know if you need anything else!
~ Zoe