The X intercept is whatever number that can be plugged in for x that will make the equation equal to zero. +b is the y-intercept.
Step-by-step explanation:
For example, the X intercept of 3x + 1 = y is -1/3 because when -1/3 is plugged for x, 3 times (-1/3) is -1. -1 + 1 is equal to 0, so the x-intercept is -1/3. The y-intercept is 1 because 1 is where b is in the equation. If there is no number for b, the y-intercept is 0.