I drew the line like this.  Can you find two good points from this line? 
Click to see what I picked.

Using these two points what would the slope of the line be? 
Check your answer.

The slope of the line is 7.5.

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What is the meaning of this slope? 
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What would be the equation of this line? 
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Using this equation, predict the TAKS score of a student that received a grade of 70 in this Geometry class. 
Check your answer.

A 70 in class should result in a 2100 on TAKS.

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Using the equation predict what grade a student needs in class to receive a 2400 on TAKS. 
Check your answer.

A student needs to earn a 110 to get a 2400.
This does not mean it's impossible.  The equation has its limitations.

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