To find the equation that represents the problem, we can break down the information provided:
- Maria starts with $50.
- She saves $19 each week.
- We need to find out how many weeks (let's denote this as \( x \)) it will take for her account to reach $259.
So, the total amount in her account after \( x \) weeks will be the initial amount plus the amount saved over those weeks:
\[ 50 + 19x = 259 \]
This equation can be rewritten in the form \( px + q = r \) as:
\[ 19x + 50 = 259 \]
Thus, the correct response is:
19x + 50 = 259