Use a Graphing Utility to Find the Equation of the Line

question 226

Multiple Choice

Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
- $\begin{array}{c|ccccc}\mathrm{x} & 1 & 3 & 5 & 7 & 9 \\\hline \mathrm{y} & 143 & 116 & 100 & 98 & 90\end{array}$

• A) \(y = 6.2 x - 140.4\)
• B) \(y = - 6.8 x + 150.7\)
• C) \(y = - 6.2 x + 140.4\)
• D) \(y = 6.8 x - 150.7\)

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Definitions:

Rule of Five

An empirical rule suggesting that there's a 93.75% chance that a normal sample will fall within ±1.96 standard deviations of the mean.

Sample Size

The quantity of data points or observations employed in an experiment or research.

Chi-Squared Test

A statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in one or more categories.

Degrees of Freedom

The amount of separate values or quantities that can be given to a statistical distribution.