The table shows periodic data. Use the drop down menus to find the phase shift. y = 2 cosine(pi/4(x-c)) + 3. The function is shifted___. (down, left, right, up). The phase shift of this function is (-1,0,1,3) units. The table has these values ( this is in order from x to y): (1,7), (3,3),(7,-1) ,(9,3) ,(11,7). So how you would read this as the x values are: 1,3,7,9,11 and the y values are: 7,3,-1,3,7.