From the previous question's data set $($telomeres$\_$stress.csv$),$ plot the residuals. Is there a

pattern of residuals across values of the $x-$variable? What are residuals, and how are they

relevant to checking for relationships between two numerical variables? $(5$ points$)$

Harpole and Tilman $(2007)$ conducted an experiment to determine whether

eutrophication $($excess nutrients$)$ led to an increase or decrease in species number in

grasslands. Plot the data $($grasslandnutrients$.$csv$)$ and use an equation to predict the

number of species present in a case where $6$ nutrients are added. What is the equation for

the line of best fit? $(5$ points$).$