In order to solve this you just have to search for the point in the graph, if the points are located in theline that the graph shows then they are actually a solution for the inequality shown, since the only point that is actually on the line that is shown in the graph is (3,-1) then that is the correct answer.
first you have to add all of the blocks and you get 21 blocks, then since he walks his dog 4 times you multiply it by 4 and get 84. so therefore he walks 84 blocks every day.
