The system of equations graphed below has how many solutions?

What is the slope of the line that contains the points (-2,1) and (0,-3)

The function show two sisters' savings account and the rate at which they plan to deposit money

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters