Describe the end behavior of the following function f(x) = x^5-x^3-x^2 a. the graph of the function starts high and ends low
b. the graph of the function starts high and ends high
c. the graph of the function starts low and end high
d. the graph of the function starts low and ends low

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).