Suppose s and t are directly proportional. If s=14 when t=12, what is s when t=7?
s/t=14/12
Then s/t, where t is 7 must equal to 14/12.
s/7=14/12
12s=98
s=98/12
s=49/6
The cartesian product of two sets is the set of all possible ordered pairs whose first component is a member of the first set and whose second component is a member of the second set.
{{s,14}}