Discover the answers you need at Westonci.ca, where experts provide clear and concise information on various topics. Join our platform to connect with experts ready to provide precise answers to your questions in various areas. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

The chart represents a data set's given values, predicted values (using a line of best fit for the data), and residual values.

\begin{tabular}{|c|c|c|c|}
\hline[tex]$x$[/tex] & Given & Predicted & Residual \\
\hline 1 & 6 & 7 & -1 \\
\hline 2 & 12 & 11 & 1 \\
\hline 3 & 13 & 15 & [tex]$g$[/tex] \\
\hline 4 & 20 & 19 & [tex]$h$[/tex] \\
\hline
\end{tabular}

Which are the missing residual values?

A. [tex]$g=2$[/tex] and [tex]$h=-1$[/tex]
B. [tex]$g=28$[/tex] and [tex]$h=39$[/tex]
C. [tex]$g=-2$[/tex] and [tex]$h=1$[/tex]
D. [tex]$g=-28$[/tex] and [tex]$h=-39$[/tex]


Sagot :

To find the missing residual values, we need to understand what residuals are. The residual for a data point is the difference between the given (observed) value and the predicted value calculated using a line of best fit.

The formula for a residual is:
[tex]\[ \text{Residual} = \text{Given value} - \text{Predicted value} \][/tex]

Let's find the residuals for each given [tex]\(x\)[/tex]:

1. For [tex]\(x = 1\)[/tex]:
[tex]\[ \text{Given} = 6, \quad \text{Predicted} = 7 \][/tex]
[tex]\[ \text{Residual} = 6 - 7 = -1 \][/tex]

2. For [tex]\(x = 2\)[/tex]:
[tex]\[ \text{Given} = 12, \quad \text{Predicted} = 11 \][/tex]
[tex]\[ \text{Residual} = 12 - 11 = 1 \][/tex]

3. For [tex]\(x = 3\)[/tex]:
[tex]\[ \text{Given} = 13, \quad \text{Predicted} = 15 \][/tex]
[tex]\[ \text{Residual} = 13 - 15 = -2 \][/tex]

4. For [tex]\(x = 4\)[/tex]:
[tex]\[ \text{Given} = 20, \quad \text{Predicted} = 19 \][/tex]
[tex]\[ \text{Residual} = 20 - 19 = 1 \][/tex]

Thus, the missing residual values are:
- For [tex]\(x = 3\)[/tex], [tex]\(g = -2\)[/tex]
- For [tex]\(x = 4\)[/tex], [tex]\(h = 1\)[/tex]

Therefore, the correct answer is:
[tex]\[ g = -2 \quad \text{and} \quad h = 1 \][/tex]

Hence, the correct option is:
[tex]\[ g = -2 \text{ and } h = 1 \][/tex]