Final answer:
The constant of proportionality in a directly proportional relationship is represented by the value of k in the equation y=kx. For example, if the ordered pair is (2, 6), the constant of proportionality is 3.
Step-by-step explanation:
The constant of proportionality in a directly proportional relationship is always represented by the same value, regardless of the specific points that are being examined.
In the equation y = kx, the constant of proportionality is denoted by the variable k.
For example, if we have the ordered pair (2, 6) as one of the points on the graph of a directly proportional relationship, then we can determine the constant of proportionality by dividing the y-coordinate by the x-coordinate: k = 6/2 = 3. So, the point that represents the constant of proportionality is (3,3).