Final answer:
In the provided scenario, a dog photographer earns $150 per photo and has an upfront cost of $300 for supplies. The equation to calculate total earnings for any number of photos taken is Total Earnings = 150p - 300, where p represents the number of photos.
Step-by-step explanation:
A dog photographer earns a certain amount for each photo provided and also has expenses for supplies. To create a description that calculates how much the photographer could earn with any number of photos, we use an example:
'A dog photographer earns $150 for each photo he provides. He had to pay $300 for supplies. Therefore, if the photographer takes p photos, the total earnings can be calculated with the formula: Total Earnings = 150p - 300.'
This formula allows for calculating the earnings for any number of photos (p). For instance, if the photographer takes 5 photos, the total earnings would be Total Earnings = 150 * 5 - 300 = 750 - 300 = $450. Similarly, we can calculate this for any number of photos taken by the photographer to determine the earnings accordingly.