To solve this problem, we can define a variable for the number of children Anthony watches.
Let \( x \) be the number of children he watches.
Anthony's earnings can be calculated as follows:
- Base pay per hour: $8.00
- Additional bonus per hour per child: $1.50 per child
So, the total earnings per hour can be expressed as:
\[ 8.00 + 1.50x \]
We also know that his total hourly rate is $12.50. Therefore, we can set up the equation:
\[ 8.00 + 1.50x = 12.50 \]
To convert this into the form \( px + q = r \), we can rearrange it:
- Subtract 8.00 from both sides:
\[ 1.50x = 12.50 - 8.00 \]
- Simplify the right side:
\[ 1.50x = 4.50 \]
Thus, we have the equation in the required form:
\[ 1.50x + 8.00 = 12.50 \]
In summary, the equation representing this problem is:
\[ 1.50x + 8.00 = 12.50 \]
Here, \( p = 1.50 \), \( q = 8.00 \), and \( r = 12.50 \).