View of /trunk/NationalProblemLibrary/Rochester/setAlgebra14Lines/sw2_4_23.pg

    1 ##DESCRIPTION
    2 ##  find the equation of the line given two points on the line
    3 ##ENDDESCRIPTION
    4 
    5 ##KEYWORDS('algebra', 'lines')
    6 ## pphi tagged and PAID on 12-12-2003
    7 
    8 ## DBsubject('Algebra')
    9 ## DBchapter('Coordinates and Graphs')
   10 ## DBsection('Lines')
   11 ## Date('6/3/2002')
   12 ## Author('')
   13 ## Institution('')
   14 ## TitleText1('College Algebra')
   15 ## EditionText1('3')
   16 ## AuthorText1('Stewart, Redlin, Watson')
   17 ## Section1('2.4')
   18 ## Problem1('23')
   19 DOCUMENT();        # This should be the first executable line in the problem.
   20 
   21 loadMacros(
   22 "PG.pl",
   23 "PGbasicmacros.pl",
   24 "PGchoicemacros.pl",
   25 "PGanswermacros.pl",
   26 "PGauxiliaryFunctions.pl"
   27 );
   28 
   29 TEXT(beginproblem());
   30 $showPartialCorrectAnswers = 1;
   31 
   32 $x1 = non_zero_random(-2,5,1);
   33 $y1 = non_zero_random(-5,6,1);
   34 
   35 TEXT(EV2(<<EOT));
   36 The equation of the line with \(x\)-intercept \($x1\) and
   37 \(y\)-intercept \($y1\) can be written in the form \( y = mx+b \) where
   38 $BR
   39 the number \( m \) is: \{ans_rule(10) \}
   40 $BR
   41 the number \( b \) is: \{ans_rule(10) \}
   42 EOT
   43 
   44 $ans1 = -$y1/$x1;
   45 $ans2 = $y1;
   46 
   47 ANS(num_cmp($ans1));
   48 ANS(num_cmp($ans2));
   49 
   50 ENDDOCUMENT();        # This should be the last executable line in the problem.