A supermarket finds that the number of boxes of a new cereal sold increases each week In the first week only 16 boxes of the cereal were sold In the next week 33 boxes of the cereal were sold and in the third week 50 boxes of the cereal were sold The number of boxes of cereal sold each week represents an arithmetic sequence What is the explicit rule for the arithmetic sequence that defines the number of boxes of cereal sold in week n O a 17n 1 O a 17n 33 an 17n 1 O a 17n 33