text: ## DESCRIPTION
  ## 
  ## ENDDESCRIPTION
  
  ## DBsubject(Algebra)
  ## DBchapter(Functions)
  ## DBsection(Interpretation and applications)
  ## Date(06/06/2017)
  ## Institution(Red Rocks Community College, Colorado Community College System)
  ## Author(Adam Forland)
  ## MO(1)
  ## KEYWORDS('algebra','average rate of change')
  
  
  ###########################
  #  Initialization
  
  DOCUMENT();
  
  loadMacros(
  "PGstandard.pl",
  "MathObjects.pl",
  "AnswerFormatHelp.pl",
  "niceTables.pl",
  "PGML.pl",
  "PGcourse.pl",
  );
  
  TEXT(beginproblem());
  
  $showPartialCorrectAnswers = 1;
  
  
  ###########################
  #  Setup
  
  $a = random(20700,20850,1);
  $b = random(21250,21400,1);
  $c = random(10, 15,.5);
  
  Context("Numeric");
  
  $ans1 = Compute(($b -$a)/$c );
  
  
  ###########################
  #  Main text
  
  
  BEGIN_TEXT
  At the start of a trip, the odometer on a car read
  $a miles. At the end of the trip, $c hours later, the
  odometer read $b miles.
  $BR
  $BR
  What is the average speed the
  car traveled during this trip? \{ans_rule{20}\} miles/hour
  $BR
  
  END_TEXT
  
  ############################
  #  Answer evaluation
  
  
  install_problem_grader(~~&std_problem_grader);
  
  $showPartialCorrectAnswers = 1;
  
  ANS($ans1->cmp()  );
  
  
  ############################
  #  Solution
  
  #BEGIN_PGML_SOLUTION
  #Solution explanation goes here.
  #END_PGML_SOLUTION
  
  COMMENT('MathObject version. Uses PGML.');
  
  ENDDOCUMENT();