Mortgage and Real-Estate Vocabulary Review

Term 1: Direct Variation
Definition 1: A mathematical relationship where the variable $y$ changes proportionally to the variable $x$.
Term 2: Constant of Proportionality
Definition 2: The constant in a direct variation equation, represented by $k$ in $y = kx$. It is the ratio of $y$ to $x$.
Term 3: Inverse Variation
Definition 3: A mathematical relationship where the variable $y$ changes proportionally to the inverse of the variable $x$.
Term 4: Constant of Inverse Proportionality
Definition 4: The constant in an inverse variation equation, represented by $k$ in $y = \frac{k}{x}$. It is the product of $x$ and $y$.
Term 5: Joint Variation
Definition 5: A mathematical relationship where a variable varies directly with multiple other variables.
Term 6: Combined Variation
Definition 6: A mathematical relationship incorporating both direct and inverse variations.
Term 7: $y = kx$
Definition 7: The equation representing direct variation, where $k$ is the constant of proportionality.
Term 8: $y = \frac{k}{x}$
Definition 8: The equation representing inverse variation, where $k$ is the constant of inverse proportionality.
Term 9: $a = kbc$
Definition 9: The equation representing joint variation of $a$ with $b$ and $c$, where $k$ is the constant of proportionality.
Term 10: $y = \frac{kx}{z}$
Definition 10: The equation representing combined variation where $y$ varies directly with $x$ and inversely with $z$.