This graph shows a proportional relationship. what is the constant of proportionality? enter your answer as a ratio in simplified form in the box. a graph with a line running through coordinates left parenthesis 0 comma 0 right parenthesis and coordinates left parenthesis 2 over 5 end fraction comma 1 over 2 end fraction right parenthesis. plz : (

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem we have that

The line pass through the points

Find the value of the constant of proportionality k

For x=2/5, y=1/2  

substitute

what's that