What is the equation of the line that best fits the given data? A graph has points (1, 7), (1, 6), (2, 5), (2.5, 5), (3, 3), (4, 1). a. y = negative 5 x + 11 c. y = 3 x + 10 b. y = negative one-third x + 10 d. y = negative 2 x +