Posted by chelsea on Friday, June 10, 2011 at 8:08am.
A direct variation should
1. be a linear function of one variable
2. passes through the origin (0,0), i.e. if the independent variable is set to zero, the dependent variable should also be zero.
If you examine the four choices according to the above criteria, you will be able to eliminate all but the required function.
-4 + 7x + 4 = 3y
-4 + 7x + 4 = 3y
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