SOLVE FOR P , please help me

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Find the value of x for which the lines are parallel.