Which theorems and postulates can be used to determine if lines are parralel

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

5(-9w) put expression in distributive property

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9