Answer:
[tex] \frac{3}{2} [/tex]
Step-by-step explanation:
There is a constant difference between the x-values as well as the y-values.
The constant of proportionality can be found by calculating the slope using any pair of points
Let us use (2,3) and (4,6).
Use the slope formula:
[tex]m = \frac{y_2-y_1}{x_2-x_1} [/tex]
We substitute the values to get:
[tex]m = \frac{6 - 3}{4 - 2} = \frac{3}{2} [/tex]
Therefore the constant of proportionality is
[tex] \frac{3}{2} [/tex]
