Final answer:
The equation for David's total pay on a day he sells x computers is P = 15x + 80. P represents David's total pay, x represents the number of computers he sells, 15 represents the commission he earns per computer sale, and 80 represents his guaranteed base pay.
Step-by-step explanation:
The equation for David's total pay on a day he sells x computers can be written as:
P = 15x + 80
- P represents David's total pay
- x represents the number of computers he sells
- 15 represents the commission he earns for each computer sale
- 80 represents his guaranteed base pay
So, to find David's total pay on a particular day, you would substitute the number of computers he sells into the equation.