A gym member ship is 630 per year what is the cost per month

I'll give brainliest if you answer right : )

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?

Write the point-slope form of an equation of the line through the points (-2, -3) and (-7, 4).