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Section 4: Function

In this section, you will first be tested on your current function skills by doing some problems.  Then if it is required, you will be taken to the review lessons to review the topic once more.  Otherwise, you will be taken to the next section.

Do the following problems:

1.  What is a function?

    A.     Just another hard word
    B.     Every X value has only one Y value
    C.     Abilities to do things
    D.     Every Y value has only one X value
   E.      None of Above

2.  If f(x) = x^3 + x^2 + 2x + 1 and x = 5, evalute this expression.

    A.     160
    B.     159
    C.     162
    D.     161
    E.     170

3. If f(x) = square root of x and g(x) = square root of (x^2 + 4), what is the value of f(g(2))?

    A.     0
    B.     1.41
    C.     1.68
    D.     2.45
    E.     2.83

4. If f(x) = x + 2, what is the inverse of f(x)?

    A.     x + 2
    B.     x - 2
    C.     2x
    D.     x/2
    E.     Undefined

5. What is the maximum value of f(x) = 2 - (x + 2)^2?

    A.     -4
    B.     -2
    C.     0
    D.     2
    E.     4

Click "Preceding Page" to see the answers.