Final answer:
The graphs of y = |x| and y = |x| - 15 have the same 'V' shape, but y = |x| - 15 is shifted down by 15 units, changing its y-intercept to (0,-15).
Step-by-step explanation:
The graphs of y = |x| and y = |x| - 15 are related by a vertical shift. The function y = |x| is known for its characteristic 'V' shape, with the vertex at the origin (0,0). When we subtract 15 from the absolute value function, we are shifting the entire graph down by 15 units. This means that the shape of the graph remains the same, but the position of the graph on the coordinate plane changes. The new graph y = |x| - 15 will thus have a y-intercept at (0,-15) instead of (0,0). However, the slope of the lines on either side of the vertex remains the same, as the absolute value causes the slope to be 1 on one side of the vertex and -1 on the other side, irrespective of the vertical shift.