An HR specialist uses the linear equation $y = 5x - 4$ to calculate an employee's engagement score $y$ based on the number of training hours $x$ completed. True or False: This equation defines a function because every specific value substituted for $x$ results in exactly one unique output value for $y$.

A project manager uses the equation $y = 5x - 4$ to estimate the total cost $y$ of a service based on the number of hours $x$ required. According to the definition of a function, this equation defines a function because for every specific value substituted for $x$, there is exactly ____ corresponding value for $y$.

Shipping Cost Function Identification

A business analyst uses the equation $y = 5x - 4$ to calculate a daily performance score $y$ based on the number of completed tasks $x$. Arrange the following steps in the correct logical order to verify that this equation defines a function.

A corporate billing department uses the equation $y = 5x - 4$ to calculate a service fee $y$ based on the number of transactions $x$. Match each component of this functional relationship with its correct description to demonstrate how this equation defines a function.

Explaining the Predictability of a Cost Function