Chapter One Cassie Petrick

Chapter One Cassie Petrick

1. 1.2

   • Expressing as a relation: (x,y), (x,y)
   • x axis: domain/input
     • y axis: range/output

2. 1.4

   • Function: each input has one output
   • m=-2(t+3)
     • t: ind. var.
     • m: dep. var.
   • vert. line test
     • touch one line: function
     • if it touches more than one line: no solution

3. 1.5

   • f(x)=x^2
   • C=f(a)
     • f(a): name
     • a: ind. var.
     • c: dep. var.

4. 1.7

   • domain
     • input
       • ind. var
         • x- values
     • range
       • output
         • dep. var.
           • y- values
   • (∞)
     • [#]
   • -6x≤18
     • / 6
       • Divide 6 on both sides
       • x ≥ -3
         • flip sign when dividing by negative!!

5. 1.9

   • b^2+144=0
     • -144 -144
       • b^2=-144
         • √-144
           • No Real Solution
             • cant square root a neg. number
           • square both sides; left with 144
         • new solution
       • subtract 144 from each side