The equation y = ax describes a parabola. If the value of a is positive, which way does the parabola open?
A. Left
B. Right
C. Up
D. Down

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”?

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8

Determine the intercepts of the line that passes through the following points. (15,-3)(15,−3) (20,-5)(20,−5) (25,-7)(25,−7)