To determine the rate, we can analyze the change in cost ($C$) relative to the change in the number of photos ($p$).

From the table:

• When the number of photos increases by 5 (from 5 to 10), the cost increases from $35.50 to $36.00, which is a difference of $36.00 - 35.50 = 0.50$.
• Similarly, each subsequent increase of 5 photos (from 10 to 15 and 15 to 20) results in an increase of $0.50 in cost.

Thus, for every additional 5 photos, the cost increases by $0.50. To find the rate per photo, we divide this change by the number of photos:

$\text{Rate} = \frac{0.50}{5} = 0.10$

Answer: The rate is $0.10 per photo.

Would you like further details or have any other questions?

Here are some related questions that might expand your understanding:

1. What would be the total cost for 25 photos based on this rate?
2. How can we represent this rate as a linear equation?
3. What would be the cost for a single photo based on this rate?
4. How would the cost change if the rate increased to $0.15 per photo?
5. Can we predict the cost for a larger number of photos, like 50?

Tip: When calculating rates, always ensure consistent units in both the numerator and the denominator to interpret the rate accurately.