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Hello

I am a fifth grader and can not find the rule for

X= 6,10,12,15 and then a blank. With Y=54, 50,48 then a blank and then 0?

Thanks

By graphing, you can see that (6, 54), (10, 50), and (12, 48) lie on the same straight line.

http://www.flickr.com/photos/dwread/8559214205/

Use (6, 54) and (10, 50) to determine the slope.

rise = 50 - 54 = -4

run = 10 - 6 = 4

slope = rise/run = -1

Use (10, 50) to write the point-slope equation of the line.

y - 50 = (-1)(x - 10)

Rearrange to solve for y:

y = -x + 60

When x = 15, y = 45.

When y = 0, x = 60.

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