Mr. guzman has 100 cows on his dairy farm. of the cows , 57 are holstein. what decimal represents the portion of cows that are holstein?
a,0.43
b,0.57
c,5.7
d,57.0

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? )