In all but one instance, the same y value corresponds to different x values on each line. This is where the two lines RT and JK intersect or cross. In your economics class you will be asked to draw conclusions from information presented in graphs where a line has shifted positions. It is important to be able to interpret what is happening on a graph after a shift occurs. You will typically be asked what happens to the intersection point of two lines when one of them shifts.
Lines shifts to the right.
Before attempting to answer this question, we should look at a graph that illustrates this scenario. The x -coordinate changed from 2 to 3. The y -coordinate changed from 3 to 4. Both the x and y coordinates increased as the line S shifted to the right. This is only one type of shift, a shift to the right.