Posted by kara on Sunday, November 28, 2010 at 4:21pm.
A plane that carries mail makes a round trip each day from Chicago to New York. It makes 3 intermediate stops on the way to New York and 1 intermediate stop on the way back to Chicago. Suppose you make a graph of the altitude of the plane for one day, with time on the horizontal axis and altitude on the vertical axis. How many times will the graph touch the horizontal axis?

algebra  PsyDAG, Monday, November 29, 2010 at 11:07am
If you count the starting point: Chicago, 3 stops, New York, 1 stop, Chicago = ?

algebra  Amber, Friday, February 25, 2011 at 11:58am
I have this problem too!
I can't figure it out either. lol

algebra  destiny, Wednesday, June 11, 2014 at 2:55pm
A plane that carries mail makes a round trip each day from Chicago to New York. It makes 3 intermediate stops on the way to New York and 1 intermediate stop on the way back to Chicago. Suppose you make a graph of the altitude of the plane for one day, with time on the horizontal axis and altitude on the vertical axis. How many times will the graph touch the horizontal axis?

algebra  elyssia, Friday, September 11, 2015 at 5:16pm
A plane that carries mail makes a round trip each day from Chicago to New York. It makes 2 intermediate stops on the way to New York and 1 intermediate stop on the way back to Chicago. Suppose you make a graph of the altitude of the plane for one day, with time on the horizontal axis and altitude on the vertical axis. How many times will the graph touch the horizontal axis?
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