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Algebra_3

Chapter 67

Problem 3

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The president was given a performance rating score in June of percent and
a performance rating of percent in November of the same year.
The June rating was weighted % and the November rating was weighted %.
Find the weighted average W for his performance score.


The weighted average W =




Example:

Jack's test scores were 75, 80, 88, and 93.
What was the weighted average of his scores if the tests were weighted 1, 2, 3, and 4 in that order?

The weighted average can be written as click refresh (F5)

Try this solution by entering (1*75+2*80+3*88+4*93)/(1+2+3+4) into the
Graphing Calculator below in the Function f(x) = box .
Click on the Plot Graph button.
The answer will appear below the Function f(x)=box as f(x) = 87.1