Please give me the correct answer. Why isn't nobody answering my question ?Please I need help.

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.

Two lines that do not intersect are skew. always sometimes or never

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)