Definition of Dependent Variable. Dependent Variable is a variable whose value depends on the values of one or more independent variables. In p = 4q, p is the dependent variable, because its value depends on the value of q.
Back in five minutes. Walmart's No Receipt policy applies to items returned in a store only. When you return an item without a receipt, you have the option of receiving a cash refund (for purchases under $25), a Gift Card for the amount of the purchase (for purchases over $25) or making an even exchange for the product. You should be good to go. StickMane and ghj like this.
There is no law for or against whether you need a receipt to return an item. That is a policy up to the company. If the company refuses to accept the refund without a receipt, your only other recourse would be to go through the manufacturer for a replacement.