1. The problem statement, all variables and given/known data 1. An oil tanker springs a leak creating a circular oil slick that grows until its radius is 3.0 km. a.) What is the formula describing the relation between the area of the slick and its radius? 2. Relevant equations Area of a circle: (pi)r^2 3. The attempt at a solution Is the equation for a) y = (pi)r^2, or is it the derivative: y = 2(pi)r?