In a secendary school there are 40 classes altogether. 8 out of classes are year 7 classes. what fraction in the school are in year 7? give your answer in its simplest form

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? )