After the journalism club sold 60 magazines, it had $220 in profit. after it sold a total of 100 magazines, it had a total of $420 in profit. which equation models the total profit, y, based on the number of magazines sold, x?
a. y – 220 = 2(x – 60)
b. y + 220 = 5(x + 60)
c. y + 220 = 2(x + 60)
d. y – 220 = 5(x – 60)

For this item, we let x be the number of magazines sold and y be the profit as instructed. Based from the data given, the system of linear equation that would best depict the given scenario is,
                                  220 = 60x + b
                                  420 = 100x + b
The values of x and b in the equation are 5 and -80.
                                 y = 5x - 80

From the given choices, the answer should be the last choice.