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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics - 2
Functions

  1. A function is a relation (usually an equation) in which no two ordered pairs have the same x-coordinate when graphed.
  2. One way to tell if a graph is a function is the vertical line test, which says if it is possible for a vertical line to meet a graph more than once, the graph is not a function.
  3. Functions are usually denoted by letters such as f or g. If the first coordinate of an ordered pair is represented by x, the second coordinate (the y coordinate) can be represented by f(x).
  4. When a function is an equation, the domain is the set of numbers that are replacements for x that give a value for f(x) that is on the graph.

Example 1:
For f(x) = 2x+6, find f(5)
f(x) = 2x+6 = 2x5+6 = 10 + 6 = 16

Example 2:
Find the domain of the function f(x) = 4/x
x can take any value except zero. Since division by 0 is not defined.
Therefore, the domain is said to be x > 0 and x < 0.


Directions: Answer the following questions. Also write at least 10 examples of your own.

Have your essay responses graded by your teacher and enter your score here!

Your score for this chapter (0-100%) =


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