For an entire grading period at school, James played video games for 70 minutes a day, and has a GPA of 2.3. For the next grading period his parents said he was not allowed more than 45 minutes of video games each day and his GPA increased to 3.58. Which statement about this situation is true?
A) The number of minutes playing video games varies inversely with GPA with a constant of variation k = 30.4.
B) The number of minutes playing video games varies inversely with GPA with a constant of variation k = 161.
C) The number of minutes playing video games varies directly with GPA with a constant of variation k = 161.
D) The number of minutes playing video games varies directly with GPA with a constant of variation k = 30.4.