I’m really confused on how to do this

Can some one me with this math problem?

Measures of the angle of r, 31 s (x+4) t (3x+9)

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? )