Slope of a Regression Model (Setup) Practice Test

A conservationist studies whether the number of visitors to a park per day ($x$) predicts the amount of litter collected in pounds ($y$). The conservationist claims that more visitors leads to more litter in the population. Which hypotheses are appropriate for testing this claim about the slope in the regression of $y$ on $x$?

A social scientist studies whether the number of close friends a person reports ($x$) predicts a loneliness score ($y$), where higher scores mean more lonely. The scientist believes that more close friends is associated with lower loneliness in the population. Which hypotheses are appropriate for testing the claim about the slope in the regression of $y$ on $x$?