It’s cost $15 to send 3 packages through a certain shipping company. Consider the number of packages per dollar. A. Find the constant of proportionality for this situation.
B. Write an equation to represent the relationship.

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

The table shown below gives the approximate enrollment at the university of michigan every fifty years. how many more students were enrolled at the university of michigan in 1950 than in 1900?