Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
-$$\begin{array} { c | c c c c c }
x & 1 & 3 & 5 & 7 & 9 \
\hline y & 143 & 116 & 100 & 98 & 90
\end{array}$$
A) y = -6.2x + 140.4
B) y = -6.8x + 150.7
C) y = 6.8x - 150.7
D) y = 6.2x - 140.4

Question

Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
-$$\begin{array} { c | c c c c c } 
x & 1 & 3 & 5 & 7 & 9 \
\hline y & 143 & 116 & 100 & 98 & 90
\end{array}$$
A) y = -6.2x + 140.4
B) y = -6.8x + 150.7
C) y = 6.8x - 150.7
D) y = 6.2x - 140.4

Quizplus · Accepted Answer

Using a graphing utility to plot the points and find the line of best fit, the equation that most closely matches the given data points, when rounded to two decimal places, is y = -6.2x + 140.4. This line has a negative slope, indicating a decrease in y as x increases, which aligns with the trend shown in the data.

Use a Graphing Utility to Find the Equation of the Line