Assume that y varies inversely with x. if y=6.4when x=4.4, find y when x=3.2

If 20% of a number is 35, what is 50% of that number?

Which equation represents a line that passes through the point (9, -4) and has a slope of 3/5?

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).