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GeoGebraClasse GeoGebra

The Burning Candle

The power has gone out at our house. All we have are candles. We aren't sure though how long each candle will last, and we need to have light through the entire night. The activity below shows a candle burning over time (in minutes). Drag the time point to determine the relationship for how fast the candle is burning where height is in inches.

Examine how the candle burns. Based on the given information, how tall was the candle initially?  Also, how quickly was the candle burning?

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If the candle continues to burn at the same rate, how tall will the candle be after 60 minutes?

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If the candle continues to burn at the same rate, how long will it take for the candle to burn out?

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We were able to find 7 of these candles. With these 7 candles, if we lit the first candle at 9pm, will we make it to 7am when it is time for my children to get up? Explain.

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