What is the constant of proportionality between the graph y and x

0.2

Step-by-step explanation:

The graph shows that y ∝ x and y = mx (1)

{Where m is called the constant of proportionality in algebra and is called the slope of the straight line in coordinate geometry}

Now, it is given in the graph that the straight line passes through the point (5,1).

Therefore, equation (1) will be satisfied by the point.

Hence, 1 = 5m, ⇒ m = 0.2

So, the slope or the constant of proportionality of the graph is 0.2. (Answer)