You and your friend leave your houe at the ame time to meet at a retaurant. The ditance (in mile) your friend i from the retaurant i given by $y=-40x100$ , where $x$ i the number of hour ince your friend left home. You live 150 mile from the retaurant and arrive at the ame time a your friend. Write a linear equation that repreent your ditance from the retaurant