Which is the zero of the graph

Can you guys plz answer this question in order and quickly plz i will give 30 points

Carl wants to buy a television that cost $500 including taxes. to pay for television he will use a payment plan that requires him to make a down payment of $125 and then pay $70.50 each month for six months what is the percent increase from the original cast of the television to the cost of the television using a payment plan.

How do you find the circumfrance of a circle?