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When you plot the following data in a scatter plot, will your trend line be increasing, decreasing, or horizontal?

\begin{tabular}{l|llllll}
X & 2 & 4 & 5 & 6 & 7 & 10 \\
\hline
Y & 0 & 1 & 2 & 5 & 6 & 10
\end{tabular}

A. Increasing
B. Horizontal
C. Decreasing


Sagot :

To determine the direction of the trend line for the given data, we need to understand the relationship between the x-values (2, 4, 5, 6, 7, 10) and the y-values (0, 1, 2, 5, 6, 10). The trend line in question is described by the equation of a linear regression line, which is of the form:

[tex]\[ y = mx + b \][/tex]

Here, [tex]\(m\)[/tex] represents the slope and [tex]\(b\)[/tex] represents the y-intercept.

### Slope
The slope ([tex]\(m\)[/tex]) indicates the steepness and the direction of the trend line:
- A positive slope indicates an increasing trend line.
- A negative slope indicates a decreasing trend line.
- A zero slope indicates a horizontal trend line.

For the given data, after performing a linear regression analysis, we obtain:
[tex]\[ m = 1.3392857142857142 \][/tex]
[tex]\[ b = -3.5892857142857064 \][/tex]

The key component here is the slope [tex]\(m\)[/tex]. Let's examine its value:

### Analysis
The slope [tex]\(m = 1.3392857142857142\)[/tex] is positive. A positive slope means that as the x-values increase, the y-values also increase. This results in a trend line that slopes upwards from left to right.

### Conclusion
Since the slope is positive, the trend line will be increasing when we plot the data.

So, the correct answer to the question is:
Increasing