Final answer:
The constant of proportionality in the equation y = 32x is 32.
Step-by-step explanation:
The constant of proportionality in the equation y = 32x is 32.
In a direct proportion, the value of the dependent variable (y) is equal to the product of a constant (k) and the independent variable (x).
In this case, y is always 32 times x, so k is equal to 32.
Therefore, the constant of proportionality in the equation is 32.