The pressure, p, on a diver varies directly as the depth of the water, d. Using k as the constant of variation, write an equation expressing this relationship. Do not include spaces in your answer. Enter fractions just as you would on the calculator.

Relationships between variables can be direct or inverse. For direct variation, the value of one parameter is a multiple of the other parameter using a proportionality constant, k. To illustrate the relationship between pressure and depth, the equation would be: P=kd