how many interger coordinates

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how many interger coordinates

by blaster » Wed Dec 08, 2010 10:06 am

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by GMATGuruNY » Wed Dec 08, 2010 10:21 am
blaster wrote:Image
The equation of the line is y = -3/5(x) + 30. Every x value that is a multiple of 5 will yield a corresponding y value that is an integer. Since between 0 and 50 there are 50/5 = 10 multiples of 5, 10 points on the line segment will have coordinates that are both integers.
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