Some Functions in Algebra 1

Some Functions in Algebra 1

1. Type of functions

   • Linear
   • Exponential
   • Quadratic

2. Representations

   • Tables
   • Graphs
   • Ordered Pairs
   • Mapping Diagrams
   • Real-life situations

3. Functions are relations

   • {(11, -2), (12, -1), (13, -2), (20, 7)}
     • There is no value in the domain that corresponds, or maps, to more than one value in the range.
   • No vertical line intersects the graph at more than one point.

4. Not all relations are functions

   • {(-2, -1), (-2, 1), (-1, 0), (6, 3)}
     • The domain of -2 has two values in the range, -1 and 1.
   • Vertical Line test: passes through more than one point on the graph.