X intercept- A point on a graph where the graph intersects the x-axis and the x intercept happens on the point of the graph where the y-coordinate is zero.

Y intercept- A point on a graph where the graph intersects the y-axis and the y intercept happens on the point of the graph where the x-coordinate is zero.

You apply these two when it comes to solving equations on a graph, determining it algebraically. A challenge that I see myself doing is remembering which value is zero, either x or y. Another challenge is sometime solving it algebraically can be confusing for one. You would use this on a graph and finding values for the following intercepts.