SOLUTION: A student's test score was 684 on a scale of 200-800. Wire a linear equation to convert this score to a scale of 0-100. The test score 684 is equivalent to?

Question 177782: A student's test score was 684 on a scale of 200-800. Wire a linear equation to convert this score to a scale of 0-100. The test score 684 is equivalent to?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A student's test score was 684 on a scale of 200-800. Write a linear equation to convert this score to a scale of 0-100. The test score 684 is equivalent to?
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Form: new scale reading = (slope)(old scale reading) + (intercept)
Points: (200,0) (800,100)
slope = (100-0)/(800-200) = 1/6
Intercept: 0 = (1/6)200 + b
b = -100/3
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Equation:
new scale read = (1/6)(old reading) - (100/3)
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The test score 684 is equivalent to?
new(684) = (1/6)684 -(100/3)
new = 114 - 33 1/3
new = 80 2/3
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Cheers,
Stan H.

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