Select the functions that have identical graphs . 1)y=cos x 2)y=cos (x- 5x 2 ) 3)y=sin x

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? )