The slope of the graph represents the rate of change of the values over time. If the slope is not correct, the values returned from the function or graph are incorrect. When testing the accuracy of a slope, the desired result is information about how close the values are to the true value. The ability to calculate the percent of error in the slopes of the lines of a graph is most important when only an approximation can be made about the values. This calculation is commonly used in statistics and data analysis.
Instructions
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1
Create a fraction.
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2
Place the slope being used and the desired or actual slope into the numerator. Subtract the actual slope from the experimental slope.
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3
Placed the desired or actual slope in the denominator.
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4
Perform the indicated subtraction and division.
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5
Multiply the results by 100 percent. The resulting value is the percent error in reference to the actual value.