ASAP HELP I DON WANNA FAIL

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?