If KL = 5 and LM = 6.3, what is KM?

The answer is    d)  the number of minutes the students studiedin this case, the number of minutes would be the independent variable; the test grades would be the dependent variable that depends on the number of minutes the student studies. the independent variable is associated with the domain for a function. (the grades, in this case, would be the range.)it's more intuitive to have test scores as a function of time studied rather than time studied as a function of test scores, because you get good test scores from studying. your test scores depend on the amount of time studied.the number of students and different courses are irrelevant to this question.