The graph shows that the amount of water in a person's body varies directly with the person's mass. What is the ratio of the vertical distance to the horizontal distance on the graph between the points ( 15 , 10 ) and ( 30 , 20 ) ? A graph is shown in the xy-plane. The x-axis is labeled as Mass left parenthesis kilograms right parenthesis and the y-axis is labeled as Water left parenthesis kilograms right parenthesis. The values on the x-axis ranges from 0 to 45 in increments of 5 and the values on the y-axis ranges from 0 to 45 in increments of 5. Four points are marked on the graph with coordinates (0, 0), (15, 10), (30, 20), and (45, 30). A. 10 15 or 2 3 B. 5 10 or 1 2 C. 10 15 or 3 2 D. 5 10 or 2