| A | B |
| Proportion | an equation that states that two ratios are equal |
| Extraneous solution | a trial soluton that does not satisfy the original equation |
| Inverse variation | c) the relationship of two variables x and y if there is a nonzero number k such that xy=k or y=k/x the variables x and y vary inversely. |
| Rational number | a number that can be written as the quotient of two integers |
| Rational expression | a fraction whose numerator, denominator, or both are nonzero polynomials |
| Geometric Probability | the probability p an object is tossed onto region a and lands into region b where b is contained in a p=area of b/ area of a |
| Rational equation | equation that contains rational expressions |
| Rational function | a function of the form f(x)= polynomial/polynomial |
| Hyperbola | graph of a rational function whose center is (h,k) |
| Direct Variation | the relationship of two varialbes x and y if there is a nonzero number k such that y=kx or y/x=k the varialbes x and y vary directly |