Mark and Jessica are each making a linear model to predict the population of squirrels in the town park. They are both using the same data points to find an equation of the line of best fit: the squirrel population, p , in 2002 and the squirrel population, q , in 2011. Mark is using the year as the x -value, and he represents his data as (2000, p ) and (2011, q ). Jessica is using the years since 2000 as her x -value, and she represents her data as ( 2 , p ) and ( 11 , q ). Which statement best describes how their prediction equations compare?