Finding Domain - Correct Ans - Rule 1) Cannot divide by zero set denominator to zero and solve Finding Domain - Correct Ans - Rule 2) cannot take the square root of negative number set what is inside radical >= 0 and solve *make number lines* Polynomial Function - Correct Ans - ex: f(x)= 2x^4 + 3x^2 - 10x all powers must be *non negative whole numbers* cannot have negative powers, square roots, or fractional powers the *degree* of the function is the highest power (in this case 4) Rational Function - Correct Ans - ex: f(x)= (x^3 +5x^2 -7) / x+1 It is the QUOTIENT of 2 polynomials This means NO negative powers, square roots or fractional powers *does NOT have a degree* Power Function - Correct Ans - ex: f(x)= 2x^5, 3x^-2, square roots, etc Powers can be any real number (including negatives and fractions) *does NOT have a degree* All polynomial functions are power functions... - Correct Ans - but the reverse is not true! Not all power functions are polynomial functions Equilibrium Point - Correct Ans - occurs where the supply function equals the demand