Do You Understand? ? Essential Question How can you represent a proportional relationship with an equation?

Step 1 ：The question asks about how to represent a proportional relationship with an equation.

Step 2 ：A proportional relationship is one in which the two quantities are in a constant ratio.

Step 3 ：This can be represented by the equation y = kx, where k is the constant of proportionality.

Step 4 ：This function takes in the constant of proportionality (k) and the value of x, and returns the corresponding y value.

Step 5 ：This represents the proportional relationship between x and y.

Step 6 ：Final Answer: A proportional relationship can be represented with the equation oxed{y = kx}, where k is the constant of proportionality.