A candle is 7 in. Tall after burning for 1 h. The same candle is 5 1/2 in. Tall after burning for 4 h. Write a linear equation to model the height y after burning x hours

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08-03-2018
Mathematics

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A candle is 7 in. Tall after burning for 1 h. The same candle is 5 1/2 in. Tall after burning for 4 h. Write a linear equation to model the height y after burning x hours

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sqdancefan sqdancefan · Answer 1 · 2018-03-08T03:19:25+01:00

sqdancefan sqdancefan

08-03-2018

You are given two points on the line:
.. (1, 7) and (4, 5.5)

You can use the 2-point form of the equation for a line.
.. y = (y2-y1)/(x2-x1)*(x -x1) +y1
.. y = (5.5 -7)/(4 -1)*(x -1) +7
.. y = -0.5x +7.5

Your linear equation is y = -0.5x +7.5

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