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Determine whether the function represented by the table is linear or not.

\begin{tabular}{|c|c|}
\hline
[tex]$x$[/tex] & [tex]$y$[/tex] \\
\hline
2 & -2 \\
\hline
6 & -3 \\
\hline
10 & -6 \\
\hline
14 & -8 \\
\hline
\end{tabular}

A. Linear
B. Not linear


Sagot :

To determine whether the given points are linear or not, we need to explore the relationship between [tex]\( x \)[/tex] and [tex]\( y \)[/tex] by calculating the slopes between consecutive points. If the slopes between all pairs of points are the same, the points lie on a straight line, and hence the function is linear. Otherwise, the function is not linear.

Let's list the points provided in the table:
- (2, -2)
- (6, -3)
- (10, -6)
- (14, -8)

Step 1: Compute the differences between consecutive [tex]\( x \)[/tex] values.

For the [tex]\( x \)[/tex] values:
- [tex]\( x_2 - x_1 = 6 - 2 = 4 \)[/tex]
- [tex]\( x_3 - x_2 = 10 - 6 = 4 \)[/tex]
- [tex]\( x_4 - x_3 = 14 - 10 = 4 \)[/tex]

So the differences [tex]\( \Delta x \)[/tex] are:
[tex]\[ [4, 4, 4] \][/tex]

Step 2: Compute the differences between consecutive [tex]\( y \)[/tex] values.

For the [tex]\( y \)[/tex] values:
- [tex]\( y_2 - y_1 = -3 - (-2) = -3 + 2 = -1 \)[/tex]
- [tex]\( y_3 - y_2 = -6 - (-3) = -6 + 3 = -3 \)[/tex]
- [tex]\( y_4 - y_3 = -8 - (-6) = -8 + 6 = -2 \)[/tex]

So the differences [tex]\( \Delta y \)[/tex] are:
[tex]\[ [-1, -3, -2] \][/tex]

Step 3: Compute the slopes between each pair of consecutive points.

The slope between two points [tex]\((x_1, y_1)\)[/tex] and [tex]\((x_2, y_2)\)[/tex] is given by:
[tex]\[ \text{slope} = \frac{y_2 - y_1}{x_2 - x_1} \][/tex]

- Slope between (2, -2) and (6, -3):
[tex]\[ \frac{-3 - (-2)}{6 - 2} = \frac{-1}{4} = -0.25 \][/tex]

- Slope between (6, -3) and (10, -6):
[tex]\[ \frac{-6 - (-3)}{10 - 6} = \frac{-3}{4} = -0.75 \][/tex]

- Slope between (10, -6) and (14, -8):
[tex]\[ \frac{-8 - (-6)}{14 - 10} = \frac{-2}{4} = -0.5 \][/tex]

So the slopes are:
[tex]\[ [-0.25, -0.75, -0.5] \][/tex]

Step 4: Determine linearity.

For the points to be linear, all the calculated slopes must be equal. Here we have slopes:
[tex]\[ [-0.25, -0.75, -0.5] \][/tex]
which are not all equal. This difference in slopes indicates that the points do not lie on the same straight line.

Conclusion:
The function described by the given points is not linear.