12. a) Is it true to find the x-intercept of an equation in two variables x and y, let y = 0, and solve for x. The result will be the point(s) (x, 0)? b) Is it true to find the y-intercept of an equation in two variables x and y, let x = 0 and solve for y. The result will be the point (0, y)? 13. For y = x-1 find a) x-intercept(s) b) y-intercept. Do not forget the answer is a point (x,y) not just a number