Posted by Anonymous on Tuesday, September 8, 2009 at 9:42am.
For which table(s) of values in Exercises 39–42 is the relationship
linear? Tell how you decided. Write the equation for each linear
relationship.
x y
5 20
10 30
15 40
20 50
25 50
30 50

Math  bobpursley, Tuesday, September 8, 2009 at 10:11am
Look at y. It stays constant at the end. If it were always constant, it would be linear...a horizontal line with zero slope. But near the origin, it is is not constant.
The relation is not linear.

Math  Karen, Tuesday, September 8, 2009 at 10:45am
Thank you! :)

Math  Nicole, Friday, March 5, 2010 at 2:46pm
So, no part of the table is linear? I mean, the x=5, y=20; x=10, y=30; & x=15, y=40, none of those are linear either? Or is it because of the constant at the end that none of it is linear?
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