![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Graph :
\The temperature readings were recorded for every two hours from midnight.
\(1) Draw the coordinate plane.
\(2) Plot the temperature readings with respect to time.
\(3) Connect the plotted points to a smooth curve.
\![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0116acca3e41c7c250440fce3e42e609.png\")
axis : Temperature readings.
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=125b232ef6e98acd107d00dec780ae3f.png\")
axis : Time taken for every two hours.
![\"\"](\"/userfiles/50-21-24a.gif\")
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
(b)
\Observe the graph.
\The temperature in Phoenix at 8:00 AM is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=314c2324c11c3f813f6aea8d2f96e1c3.png\")
F.
The temperature in Phoenix at 10:00 AM is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=584e035cfdcbd4e4d7865d2b40fa8266.png\")
F.
Therefore the temperature in Phoenix at 9:00 AM is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8a305e53951b7e01415eca4cafae815e.png\")
F.
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
(a) Graph of the temperature :
\
(b) Temperature at 9:00 AM is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8a305e53951b7e01415eca4cafae815e.png\")
F.