Sarah is researching the connection between the time students spend watching television and their performance in school. her studies indicate that there is an inverse relationship between tv time and gpa, and that a student who watched 15 hours of tv per week can be expected to have a gpa of 3.5. find k, the constant of variation, for this relationship.
a) 0.23
b) 4.29
c) 8.1
d) 52.5