The graph above is an equation that displays how many hours of sunlight (y value) are in a day for each month (x value) for Yuma. If Cress wants to move to Yuma, but only if there is sunlight for at least half the day for half the year, this means through x values 1-12, at least 6 of those must have y values greater than 12. For months 1, 2, 9, 10, 11, and 12, the y values are less than 12, and for months 3, 4, 5, 6, 7, 8, and 9, the y values are greater than 12. This means that there is sunlight for at least half the day for at least half the year, and Cress will be satisfied with the sunlight.