The points (0, 1), (1, 3), (2, 9), (3, 27) represent ordered pairs on a graph. Which function represents these ordered pairs?
A) f(x) = 2x
B) f(x) = 3x
C) f(x) = 4x
D) f(x) = 5x

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?