The problem can be represented with the equation in the following way:
- Maria starts with $50 in her savings account.
- She saves $19 each week. If we let \( x \) represent the number of weeks, then the total amount she saves after \( x \) weeks is \( 19x \).
- We want to find out when her total savings will reach $259.
Putting this all together, we can set up the equation as follows:
\[ 19x + 50 = 259 \]
This equation is in the form \( px + q = r \), where \( p = 19 \), \( q = 50 \), and \( r = 259 \).
So the correct response is:
19x + 50 = 259