Sasha noticed that the graph of the sales of yearbooks represented a proportional relationship. how could she have calculated the constant of proportionality by looking at the graph?
she could divide any y-value by its corresponding x-value.
she could divide any x-value by its corresponding y-value.
she could add any y-value to its corresponding x-value.
she could subtract any x-value from its corresponding y-value.

A

Step-by-step explanation:

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d