Which relation is a function? * O (1,3), (3, 5), (5,7), (7.9). (9,1)
O (4,1), (8, 2), (8,3), (16,4), (-7,6)
O (-4,6), (0,6), (-7, 6), (4, 6), (-7,8)
O (-2,3), (0,3), (4,-2), (4,6), (2,-2)

Lindsay used two points, (x, y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.