The amplitude is one-half the distance from the smallest value (38) to the largest value. (86) (86 - 38)/2 = 24
The period is the x-distance that it takes to make one full wave: one-half of a wave is made from 0 to 6, so one
full wave is made from 0 to 12: 12 = 0 = 12
The vertical shift is the shift from zero to the center y-value. The center y-value is 62, so the vertical shift is 62.