To represent the problem in the form of the equation \( px + q = r \), we first need to identify the variables involved.
Let:
- \( x \): the number of children Anthony watches.
Now, we know the following:
- Anthony is paid $8.00 for each hour worked.
- He earns an additional $1.50 per hour for each child he watches.
Thus, his total hourly earnings can be expressed as:
\[ \text{Total pay} = 8.00 + 1.50 \cdot x \]
We also know that his total hourly rate is $12.50. Therefore, we set up the equation based on his total earnings:
\[ 8.00 + 1.50x = 12.50 \]
This equation is in the desired form \( px + q = r \), where:
- \( p = 1.50 \)
- \( q = 8.00 \)
- \( r = 12.50 \)
So, the final equation representing the problem is:
\[ 1.50x + 8.00 = 12.50 \]