Functions and Relations

• Coordinate Plane


  a plane divided into 4 regions used for graphing
• Ordered Pair


  A point (x,y) on a graph
• Discrete Graph 


  A graph with distinct points
• Continuous Graph


  A graph with connected lines and curves
• Relations


  A set of ordered pairs
• Domain


  X
• Range


  Y
• Functions 


  A special relationship between values, each input has exactly one output
• Vertical line Test


  If a vertical line intersects a graph more than once, then it’s not a function
• Arithmetic Sequence


  The difference between any two consecutive terms is constant
• Common Difference


  The numerical difference, d, between any consecutive terms
• Arithmetic sequence formula

  tn=a+(n-1)d
• a


  First term
• n


  Number of terms