# Question #f28b6

##### 2 Answers

The height of the candle after

#### Explanation:

A candle is 10 in. tall after burning for 2 hours. After 3 hours, it is 8.5 in. tall. How tall will the candle be after 6 hours?

We can make a linear equation to model the situation. Since time is the independent variable and height is the dependent variable, we can let

Consider point-slope form:

where

Now, we can write a linear equation using point-slope form:

Since we want to know the height of the candle after 6 hours, we simply plug

Therefore, the height of the candle after

In support of the solution submitted by 'Y'

4 inches

#### Explanation:

Sometimes it is a good idea to 'scribble' a quick sketch to assist in visualisation of what the question is asking.

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Let the required height be

What the target is:

Reference height -

where

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