The graph shows the number of gallons of white paint that were mixed with gallons of orange paint in various different ratios: Graph titled Mixing Paint, horizontal axis labeled Orange Paint in gallons, and vertical axis labeled White Paint in gallons is shown. The horizontal scale is 0 to 48 in increments of 6. The vertical scale is 0 to 288 in increments of 36. The plotted points are 6, 36 and 12, 72 and 18, 108. The number of gallons of white paint mixed with 1 gallon of orange paint is . (1