The two moment conditions used to derive the OLS estimates are: E(xu)-O and E(u)-0. E(x-u)=0 and E(u)=0. E(xu)-0 and Elu²)=0. O E(x²u)-0 and E(u²)-0.

Does a Limiting Value Occur? A rocket ship is flying away from Earth at a constant velocity, and it continues on its course indefinitely. Let D(t) denote its distance from Earth after t years of travel. Do you expect that D has a limiting value?

The kinetic energy E of an object varies jointly with the object’s mass m and the square of the object’s velocity v . An object with a mass of 50 kilograms traveling at 16 meters per second has a kinetic energy of 6400 joules. What is the kinetic energy of an object with a mass of 70 kilograms traveling at 20 meters per second?

Find the constant of proportionality. z is directly proportional to the sum of x and y. If x=2 and y=5, then z=28.