Determine which relation is a function. O {(-5, 1).(-5,0).(-2,1),(-1, 4), (6, 2)}
O {(-5, 1), (-2,0).(-2, 2), (3, 4), (6, 2)}
O {(-5, 1), (-2, 0), (-1, 1), (2, 4), (6, 3)}
O {(-5,3), (-2, 0), (-1,2), (6,4), (6,3)}
1, 3); (6, 4)

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?