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Point Slope Equation y-y1=m(x-x1) Point Slope Standard Form Ax+Bx=C Vertex (-b/m,c) Relation Set of pairs of input and output values Domain Set of inputs (x- value) Range Set of outputs (y-value) Mapping Diagram Links domain to range Function Relation in which one element of domain is paired with EXACTLY one element in range Vertical Line Test If passes 2 points on graph=> NOT a function Coinciding Lines Same Line ( All Real ) Inconsistent Lines ParallelI Independent Lines Have one solution; Different slopes Subsitution Solving for one variable in one equation & plugging it into the second Elimination- Linear Combination Add equations together to eliminate a variable Quadratic Function f(x)=ax2+bx+c Linear Function f(x)=x+c Vertex of a Quadratic Function (-b/2a, Plug it in) Vertex Form of a Quadratic Function y=a(x-h)2+k Difference of 2 squares A2-B2=(A-B)(A+B) Difference of 2 Cubes A3-B3=(A-B)(A2+AB+B2) Sum of 2 Cubes A3+B3=(A+B)(A2-AB+B2) Discriminant (Square root of) b2-4ac