How to solve for x and steps on how to do that with the final answer

The graph shown is the graph of which function?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

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?