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 Differential Equations Ordinary and Partial Differential Equations Math Forum

 April 4th, 2019, 06:28 PM #1 Member   Joined: Jan 2019 From: tornto Posts: 48 Thanks: 0 Interpreting Graphs A liquid is heated in lab using hot plate the graph temperature vs time is shown below https://imgur.com/c6ehBn5 answer using letter A, B, C, D FROM THE ABOVE GRAPH 1) WHERE IS THE RATE OF CHANGE ZERO? 2) WHERE IS THE RATE OF CHANGE CHANGING? 3) WHERE IS THE RATE OF CHANGE POSITIVE? 4) WHERE IS THE RATE OF CHANGE GREATEST? 5) CALCULATE RATE OF CHANGE FOR SECTION A, INCLUDING UNITS? MY ANSWER FOR 1) C 2) B 3) A 4) D 5) NOT SURE HOW TO SOLVE PLEASE CHECK MY ANSWERS AND HELP ME THANKS April 4th, 2019, 07:00 PM #2 Senior Member   Joined: Sep 2015 From: USA Posts: 2,549 Thanks: 1399 rate of change is essentially the slope of the graph. You got 1) correct for 2) a constant rate of change indicates a straight line with some slope. A changing rate of change is indicated by a curved, i.e. not straight, line. See if you can answer this now. 3) You correctly identified A but there is another labelled section with a positive rate of change. 4) The greatest rate of change corresponds to the steepest slope. This looks like it should be section B 5) Just pick two points along A and use them to calculate the slope. I'd use (0,0) and (20,30) April 4th, 2019, 07:55 PM   #3
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 Originally Posted by romsek rate of change is essentially the slope of the graph. You got 1) correct for 2) a constant rate of change indicates a straight line with some slope. A changing rate of change is indicated by a curved, i.e. not straight, line. See if you can answer this now. 3) You correctly identified A but there is another labelled section with a positive rate of change. 4) The greatest rate of change corresponds to the steepest slope. This looks like it should be section B 5) Just pick two points along A and use them to calculate the slope. I'd use (0,0) and (20,30)

For question 2) i am thinking its D because constant rate is changing

FOR QUESTION 3) SHOULD BE A AND B?

WAITING FOR YOUR FEEDBACK

THANKS April 4th, 2019, 08:39 PM   #4
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 Originally Posted by yorkmanz for question 2) i am thinking its d because constant rate is changing for question 3) should be a and b? Waiting for your feedback thanks
2) yes

3) yes Tags graphs, interpreting Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post EXP Linear Algebra 4 March 8th, 2016 05:21 AM doryyroryy Calculus 4 July 12th, 2015 03:26 PM hannolo Advanced Statistics 0 November 30th, 2014 10:15 AM MageKnight Applied Math 0 January 17th, 2013 10:38 PM techdaemon Advanced Statistics 1 February 28th, 2010 10:17 PM

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