Mrs. Jarrell

1
Equations Functions

• Mrs. Jarrells Class
• Taylor County Middle School

2
Equations Functions

• Each school year, TCMS takes students who
  participate in the ACT Club to Washington, D.C.
  The trip usually cost each member

400.
3
Equations Functions

• The Clubs total admission cost is a function of
  the number of members who go to Washington.
  There are several ways to represent the function.

4
Equations FunctionsMethods

• Use a verbal description
• Make a table of values
• Write an equation
• Draw a graph

5
Method 1Verbal Description

• 400 times the number of members equals the
  total cost.

Back to Methods
6
Method 2Make a Table
Number of Members Multiply by 400 Total Cost
1 400 x 1 400
2 400 x 2 800
3 400 x 3 1200
4 400 x 4 1600

• The table lists the total cost for various
  numbers of the members.

Back to Methods
7
Method 3Equation

• Its not convenient to list all the
  possibilities in a table, so you can use
  variables.

number of members
total cost

• 400x y

Back to Methods
8
Method 4Graph

• Based on the table (method 2) four solutions of
  the equation 400xy are (1, 400), (2, 800), (3,
  1200), and (4, 1600). Graph the ordered pairs on
  a coordinate plane.

Notice that all four points lie on the same line.
Back to Methods
9
Mediography

• Burmark, L. (2002). Visual literacy learn to see,
  see to learn. Alexandria, VA Association for
  Supervision and Curriculum Development.
• Capitol image. (1991-2003) AppleWorks 6.2.9
  Computer clipart. Apple Computer, Inc.
• Park ranger image. (1991-2003) AppleWorks 6.2.9
  Computer clipart. Apple Computer, Inc.
• Jarrell, S (Illustrator). (March 21, 2007).
  Coordinate plane Computer Generated image.
• Jet image. (1991-2003) AppleWorks 6.2.9 Computer
  clipart. Apple Computer, Inc.