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Question
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.

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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Janet Yang

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I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.

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I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.

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