Use a graphing calculator to find an equation of the line of best fit for the data. Round the slope to the nearest tenth and the y- intercept to the nearest integer. when the points in the graph are: (-4,17), (-2,7),(0,8),(2,1),(4,5),(6,-2),(8, 2),(10,-8)

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?