X is a discrete random variable with probability mass function. P(x)=cx to the 2nd power for x=1/4,1/2,3/4,1
Find the value of c.
Find the expected value of X.

Which facts are true for the graph of the function below? check all that apply. f(x) = log8 x. (30 points pls )

Just tell me how to set up the equation.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.