The S A T® - College Board

Using any two pairs of values from the table, such as 10 comma 21.89 and 20 comma 31.79, and dividing the difference in the charges by the difference in the weights gives the value of m equals, the fraction with numerator 31.79, minus 21.89, and denominator 20 minus 10, end fraction, which simplifies to 9.9 over 10, or 0.99. ................
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