Determine whether the following sets of ordered pairs represent functions or) (-7,4),(-8,3),(-7,7),(-20,8),(5,9), (3,1),(2,6)}

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )