Answer:
y=10x+50
Explanation:
Having deposited $50 into the account, then depositing $10 at the end of first week, Martin's account will be 10+50=$60
After x weeks, Martin if he maintains depositing $10 weekly, he would have deposited $10*x=$10x
Additionally, the initial deposit is in the account hence total balance will be
$10x +$50
Let y represent Martin's balance after x weeks then the situation is represented by
y=10x+50