A marine mammal was studied and its depth from the ocean surface was measured in meters, y, and was timed in minutes, x. Then this data was made into a graph. What are the initial value and slope of the graph, and what do they represent?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.