IB Maths Studies/Functions

Functions as a mapping

 * relation - is a set of ordered pairs such as Q = {(2,3) (7,1) (8,3)}
 * function - is a relation is which no two different ordered pairs have the same X coordination
 * Domain - of a function is the set of independent values that are allowed
 * Range - of a function is the set of all dependent values that are allowed.

X = Domain Y = Range

Relation Properties

 * Linear: y = mx + c; (Straight Line)
 * Quadratic: y = ax^2 + bx + c; (Parabola)
 * Polynomial: y = ax^3 + bx^2 + cx + d; (Cubic)
 * Exponential: y = a * b^(k*x) + c; (Exponential)
 * Reciprocal: y = (a / (x – b) + c; (Rectangular Hyperbola)
 * Square Root: y = a √(x) + b; (Sideways Parabola)
 * Reciprocal Squared y = (a / (x – b)^2) + c; (Truncus)
 * Circular: r^2 = (x – a)^2 + (y - b); (Circle)