X-Intercept Transformations

What happens to the x-intercept of y = ax+b when you reverse the leading coefficient, a, and the constant, b?
What happens to the x-intercept(s) of y= ax² +bx +c when you reverse the leading coefficient, a, and the constant, c?
What happens to the x-intercepts of a polynomial in the form y = axⁿ+ bx^n-1 +cx^n-2+…+z when you reverse the leading coefficient, a, and the constant, z?