Chapter 1

Chapter 1

1. Dependent Variables

   • Y-axis, Output, Range, and Y values.

2. Independent Variable

   • X-axis, Input, Domain, and X values

3. Relation: any set of ordered pairs.

   • ex: (1,2) , (3,4)

4. Ordered pair: (input , output) , (x, y)

5. Function: A relation where each input has only one output.

   • ex: f(x) = x^2
   • 4 ways to represent a function: Verbally, Symbolically, Numerically, and Graphically.

6. Interval notation

   • [ = closed circle, >_ , <_
   • ) = open circle, < , >
   • domain: (-infinity, +infinity)
     • arrows always going up and getting wider
     • domain: furthest left, furthest right
   • range: [-4, +infinity)
     • brackets because we reach the point (-4,0)
     • range: lowest, highest