Acandle shop sells scented candles for $16 each and unscented candles for $10 each. the shop sells 28 candles today and makes $400.write a system of linear equations that represents the situation

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? )