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March 6, 2015

March 6, 2015

Posted by **abhigyan** on Monday, June 17, 2013 at 2:11am.

- mathematics -
**MathMate**, Monday, June 17, 2013 at 6:43amThe way to proceed is:

1. plot the two points (3,-7) and (-9,21) on graph paper

2. join the two points with a straight line (using a straight-edge)

3. If the line passes through the origin, then the two ratios are in proportion.

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