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Sagot :
Given the equation of the line of best fit: [tex]\( y = 0.4 x + 23.35 \)[/tex], we will use it to determine the predicted amount of money spent on entertainment for each number of hours worked listed.
### Step-by-Step Calculation:
1. For [tex]\( x = 4.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 4.1 + 23.35 = 1.64 + 23.35 = 24.99 \][/tex]
2. For [tex]\( x = 4.4 \)[/tex]:
[tex]\[ y = 0.4 \cdot 4.4 + 23.35 = 1.76 + 23.35 = 25.11 \][/tex]
3. For [tex]\( x = 5.6 \)[/tex]:
[tex]\[ y = 0.4 \cdot 5.6 + 23.35 = 2.24 + 23.35 = 25.59 \][/tex]
4. For [tex]\( x = 6.9 \)[/tex]:
[tex]\[ y = 0.4 \cdot 6.9 + 23.35 = 2.76 + 23.35 = 26.11 \][/tex]
5. For [tex]\( x = 7.0 \)[/tex]:
[tex]\[ y = 0.4 \cdot 7.0 + 23.35 = 2.8 + 23.35 = 26.15 \][/tex]
6. For [tex]\( x = 8.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 8.1 + 23.35 = 3.24 + 23.35 = 26.59 \][/tex]
7. For [tex]\( x = 9.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 9.1 + 23.35 = 3.64 + 23.35 = 26.99 \][/tex]
8. For [tex]\( x = 11.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 11.1 + 23.35 = 4.44 + 23.35 = 27.79 \][/tex]
9. For [tex]\( x = 11.9 \)[/tex]:
[tex]\[ y = 0.4 \cdot 11.9 + 23.35 = 4.76 + 23.35 = 28.11 \][/tex]
### Final Table:
[tex]\[ \begin{array}{|c|c|} \hline \text{Number of hours worked, } x & \text{Amount spent on entertainment, } y \text{ (in dollars)} \\ \hline 4.1 & 24.99 \\ 4.4 & 25.11 \\ 5.6 & 25.59 \\ 6.9 & 26.11 \\ 7.0 & 26.15 \\ 8.1 & 26.59 \\ 9.1 & 26.99 \\ 11.1 & 27.79 \\ 11.9 & 28.11 \\ \hline \end{array} \][/tex]
These values are the exact amounts of money spent on entertainment according to the line of best fit.
### Step-by-Step Calculation:
1. For [tex]\( x = 4.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 4.1 + 23.35 = 1.64 + 23.35 = 24.99 \][/tex]
2. For [tex]\( x = 4.4 \)[/tex]:
[tex]\[ y = 0.4 \cdot 4.4 + 23.35 = 1.76 + 23.35 = 25.11 \][/tex]
3. For [tex]\( x = 5.6 \)[/tex]:
[tex]\[ y = 0.4 \cdot 5.6 + 23.35 = 2.24 + 23.35 = 25.59 \][/tex]
4. For [tex]\( x = 6.9 \)[/tex]:
[tex]\[ y = 0.4 \cdot 6.9 + 23.35 = 2.76 + 23.35 = 26.11 \][/tex]
5. For [tex]\( x = 7.0 \)[/tex]:
[tex]\[ y = 0.4 \cdot 7.0 + 23.35 = 2.8 + 23.35 = 26.15 \][/tex]
6. For [tex]\( x = 8.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 8.1 + 23.35 = 3.24 + 23.35 = 26.59 \][/tex]
7. For [tex]\( x = 9.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 9.1 + 23.35 = 3.64 + 23.35 = 26.99 \][/tex]
8. For [tex]\( x = 11.1 \)[/tex]:
[tex]\[ y = 0.4 \cdot 11.1 + 23.35 = 4.44 + 23.35 = 27.79 \][/tex]
9. For [tex]\( x = 11.9 \)[/tex]:
[tex]\[ y = 0.4 \cdot 11.9 + 23.35 = 4.76 + 23.35 = 28.11 \][/tex]
### Final Table:
[tex]\[ \begin{array}{|c|c|} \hline \text{Number of hours worked, } x & \text{Amount spent on entertainment, } y \text{ (in dollars)} \\ \hline 4.1 & 24.99 \\ 4.4 & 25.11 \\ 5.6 & 25.59 \\ 6.9 & 26.11 \\ 7.0 & 26.15 \\ 8.1 & 26.59 \\ 9.1 & 26.99 \\ 11.1 & 27.79 \\ 11.9 & 28.11 \\ \hline \end{array} \][/tex]
These values are the exact amounts of money spent on entertainment according to the line of best fit.
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