<?xml version="1.0" encoding="UTF-8"?>
<quiz>
  <question type="multichoice">
    <name>
      <text>2.3.16 (Finding the range)</text>
    </name>
    <questiontext format="moodle_auto_format">
      <text><![CDATA[<p>What is the range of the function \(f(x) = |x|\) where \(|x|\) is the absolute value of \(x\).</p>]]></text>
    </questiontext>
    <generalfeedback format="moodle_auto_format">
      <text><![CDATA[<p>In this case the absolute value converts negative number into their positive equivalent, e.g. \(|-2| = 2\). Therefore the range of this function is all the positive real numbers, as well as \(0\). Therefore</p>]]></text>
    </generalfeedback>
    <defaultgrade>1</defaultgrade>
    <penalty>0.3333333</penalty>
    <hidden>0</hidden>
    <idnumber/>
    <single>true</single>
    <shuffleanswers>true</shuffleanswers>
    <answernumbering>abc</answernumbering>
    <showstandardinstruction>0</showstandardinstruction>
    <correctfeedback format="html">
      <text>Your answer is correct.</text>
    </correctfeedback>
    <partiallycorrectfeedback format="html">
      <text>Your answer is partially correct.</text>
    </partiallycorrectfeedback>
    <incorrectfeedback format="html">
      <text>Your answer is incorrect.</text>
    </incorrectfeedback>
    <shownumcorrect/>
    <answer fraction="100" format="html">
      <text>\([0,\infty)\)</text>
      <feedback format="html">
        <text/>
      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text>\([0,\infty]\)</text>
      <feedback format="html">
        <text>Recall that we can't have a closed interval containing infinity.</text>
      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text>\([-\infty,0]\)</text>
      <feedback format="html">
        <text>Recall that we can't have a closed interval containing infinity.</text>
      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text>\((-\infty,0]\)</text>
      <feedback format="html">
        <text/>
      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text>\([-\infty,\infty]\)</text>
      <feedback format="html">
        <text>Recall that we can't have a closed interval containing infinity.</text>
      </feedback>
    </answer>
    <answer fraction="0" format="html">
      <text>\((-\infty,\infty)\)</text>
      <feedback format="html">
        <text/>
      </feedback>
    </answer>
  </question>
</quiz>
