OPTIONAL:  Additional practice
(or close this window or tab to return to the lesson and take the test.)

The following data was collected comparing the mark (grade) in algebra class vs. the student’s TAKS score.  The teacher wants to know if she can predict the student’s TAKS scores by the grade the student get’s in class.

1. Reset the applet.
2. Go to http://www.shodor.org/interactivate/activities/Regression/. 
3. Copy and paste the data below into the box below the graph on the applet. 
4. Fit your own line.
5. Complete the tables below.

Mark , TAKS Scale

40, 1811
70, 1788
76, 2071
62, 1974
73, 2100
80, 2119
97, 2601
35, 1832
70, 1926
72, 2103
84, 2400
52, 1852
55, 1872
57, 1891
70, 2056
65, 2135
75, 2256
86, 2056
92, 2367
58, 1943
66, 2167
82, 2237
80, 2151
82, 1926
85, 2201
86, 2256
70, 1976
88, 2201
54, 2009
66, 2103
67, 1993
73, 2033

Using the red line from the applet fill in the table below.

According to the line of best fit a student would need a mark or grade of 104 to get a TAKS commended score of 2400.  Does this mean it is impossible for a student in this class to get commended on TAKS?

Check your answer.

Proceed to the next page.